CN108551578A - The vehicle grade video system electromagnetism interference test device and evaluation test method of user oriented experience - Google Patents
The vehicle grade video system electromagnetism interference test device and evaluation test method of user oriented experience Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
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Abstract
The present invention relates to the vehicle grade video system electromagnetism interference test devices and evaluation test method of a kind of experience of user oriented.The test device includes control unit, video analytic system and electromagnetic interference occurrence of equipment, further includes the Vehicular video playback equipment, camera and video signal transmission module for being set to the darkrooms EMC；The camera acquires the content that the Vehicular video playback equipment is played, the video signal output of the camera connects the video signal transmission module input, the video signal transmission module output end connects the video analytic system input terminal, the video analytic system output end connects described control unit, and the electromagnetic interference equipment sends out electromagnetic wave and interferes the acquisition and transmission of vision signal.The apparatus structure is simple, and overcoming vehicle cannot use parts interface to carry out the difficulty of video signal collection, realize the test to vehicle video system electromagnetism interference performance.
Description
Technical field
The present invention relates to automotive EMC testing fields, and in particular to a kind of vehicle grade video system of user oriented experience
Electromagnetism interference test device of uniting and evaluation test method.
Background technology
Electromagnetic susceptibility (EMS) in automotive EMC test is tested because being related to automotive electronics safe practice and user
The reasons such as experience are increasingly paid attention to by vehicle factor and automobile consumer, join with the high-quality and intelligent network of Hyundai Motor product
Change development, more and more automobiles not only need the video signal processing system using higher quality, with greater need for larger sized
Display screen substitutes traditional button to show more interactive interfaces and function.Nowadays, requirement of the consumer for automobile product
It is no longer limited to functional requirement, consumer increasingly payes attention to the user experience of automobile product, especially regarded to automobile
The user experience of frequency entertainment systems requires higher and higher.In electromagnetic susceptibility (EMS) test of vehicle video system of today,
There is phenomena such as blank screen, interim card and audio and video are asynchronous often in vehicle video system, this seriously affects user experience, and existing
Test method nearly all be use arbitrary video source, arbitrary video acquisition system, arbitrary tester is as video
The discriminator of deterioration utilizes " human eye " to judge its electromagnetic compatibility problem that may be present, this " human eye discrimination test method "
Not only lack test method unify, standardized and test philosophy, is more likely to cause electromagnetism simultaneous due to these uncertain factors
Hold test error even to draw the wrong conclusion, and since test method lacks the quantization ability of user's subjective experience, it is different
The video system quality of vehicle and different generation vehicles can not carry out horizontal and vertical comparison, no matter from vehicle factor or consumer
For angle, all it is badly in need of a kind of electromagnetic compatibility evaluation test method for the vehicle grade video system being exclusively used in user oriented experience,
It can make evaluation test feasible, with a high credibility from professional technique angle, user oriented experience to vehicle grade video system
Method.
Invention content
In order to overcome above-mentioned defect existing in the prior art, the object of the present invention is to provide a kind of experience of user oriented
Vehicle grade video system electromagnetism interference test device and evaluation test method.
To achieve the goals above, the present invention provides a kind of anti-electromagnetism of vehicle grade video system of user oriented experience is dry
Test device, including control unit, video analytic system and electromagnetic interference occurrence of equipment are disturbed, further includes being set to the darkrooms EMC
Vehicular video playback equipment, camera and video signal transmission module；
The camera acquires the content that the Vehicular video playback equipment is played, and the vision signal of the camera is defeated
Outlet connects the video signal transmission module input, and the video signal transmission module output end connects the video analysis
System input, the video analytic system output end connect described control unit, and the electromagnetic interference equipment sends out electromagnetic wave
The acquisition and transmission of vision signal are interfered.
The vehicle grade video system electromagnetism interference test device of user oriented experience is by using camera to video
The content that playback equipment is played is acquired, and vision signal is sent to video analysis system by video signal transmission module
System is handled, and is then forwarded to control unit and is carried out analysis scoring.The test device is simple in structure, easy to operation, overcomes whole
Vehicle cannot use parts interface to carry out the difficulty of video signal collection, realize the video system electromagnetism interference to vehicle
The test of energy.
Further, the video signal transmission module includes electrooptic conversion module and photoelectric conversion module, the camera shooting
The video signal output of head connects the electrooptic conversion module input terminal, and the electrooptic conversion module output end connects the light
Electric conversion module input terminal, the photoelectric conversion module input terminal connect the video analytic system input terminal.
Video electrical signal video optical signal is converted to by electrooptic conversion module to be transmitted across to avoid video electrical signal
It is distorted due to by electromagnetic interference in journey.
Further, described control unit, video analytic system and photoelectric conversion module are set in EMC control rooms, institute
Electrooptic conversion module is stated to be set in the darkrooms EMC.This effectively can be avoided video electrical signal from being distorted by electromagnetic interference, simultaneously
Also video analysis instrument operation irregularity due to by electromagnetic interference is avoided, and test system is operated convenient for tester.
Further, described control unit electromagnetic interference control output end connects the electromagnetic interference occurrence of equipment control
End.Electromagnetic interference can be realized by control unit control electromagnetic interference occurrence of equipment transmission different-waveband, the electromagnetic interference of frequency
A variety of situations test.
Further, further include radio-frequency signal source, described control unit is connect with the radio frequency signal communication, the control
OTA is wirelessly connected between radio-frequency signal source and the Vehicular video playback equipment, and the radio-frequency signal source is to the Vehicular video
Playback equipment sends video file.
The invention also provides a kind of user oriented experience vehicle grade video system electromagnetism interference evaluation test method,
Include the following steps：
S1, controls the Vehicular video playback equipment playing video file, and the camera is to the vision signal that is played
It is acquired to form video electrical signal；
The video electrical signal is converted to video optical signal by electrooptic conversion module in the darkrooms EMC, then passed through by S2
The video optical signal is converted to video electrical signal by the photoelectric conversion module for being set to EMC control rooms；
S3, video analytic system receive the video electrical signal that the photoelectric conversion module is converted, and to the video telecommunication
It number is handled；
S4, control unit receive the video analytic system and send video image and regarding the video image and source file
Processing is compared in frequency frame, obtains the video system experience score in the case of no electromagnetic interference；
S5, control electromagnetic interference occurrence of equipment sends out electromagnetic interference, and executes step S1 to S4, has obtained electromagnetic interference feelings
Video system under condition experiences score；
Video system in the case of electromagnetic interference in the case of no electromagnetic interference is experienced score and has electromagnetic interference feelings by S6
Video system experience score in the case of electromagnetic interference under condition is compared, and obtains the variable quantity of score, variable quantity is bigger, then
Interference free performance is weaker, and variable quantity is smaller, then interference free performance is stronger.
It is somebody's turn to do by respectively to whether there is or not the vision signals in the case of electromagnetic interference to be acquired, analyzes, then by comparison
The performance of the vehicle grade video system electromagnetism interference of user oriented experience.This method is simple and effective, can fast implement to vehicle
Grade video system image quality and electromagnetism interference performance carry out evaluation test.
Further, the video file that the Vehicular video playback equipment plays is that local video file or OTA are wirelessly passed
Defeated video file；
When the video file for the video file OTA wireless transmissions that the Vehicular video playback equipment plays, the control
Video code flow is modulated on control radio-frequency signal source by unit, and radio-frequency signal source is in such a way that OTA is wirelessly transferred to described vehicle-mounted
Video playback apparatus sends video file.
Further, described control unit control the electromagnetic interference occurrence of equipment send out assigned frequency, modulation system and
The electromagnetic interference of intensity, and control the Vehicular video equipment and synchronize playing video file.
Further, it is same text in the video file that no electromagnetic interference and having is played in the case of electromagnetic interference
Part, this improves the accuracy of the vehicle grade video system electromagnetism interference test of user oriented experience.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the local Video System Test functional block diagram played under scene；
Fig. 2 locally plays the video system electromagnetic compatibility test block diagram under scene
Fig. 3 is the Video System Test functional block diagram under OTA wireless transmission broadcasting scenes；
Fig. 4 is the video system electromagnetic compatibility test block diagram under OTA wireless transmission broadcasting scenes.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, unless otherwise specified and limited, it should be noted that term " installation ", " connected ",
" connection " shall be understood in a broad sense, for example, it may be mechanical connection or electrical connection, can also be the connection inside two elements, it can
, can also indirectly connected through an intermediary, for the ordinary skill in the art to be to be connected directly, it can basis
Concrete condition understands the concrete meaning of above-mentioned term.
A kind of vehicle grade video system electromagnetism interference test device of user oriented experience as shown in Fig. 1 to 2, including
Control unit, video analytic system and electromagnetic interference occurrence of equipment, further include be set to the darkrooms EMC Vehicular video broadcasting set
Standby, camera and video signal transmission module.
The camera acquires the content that the Vehicular video playback equipment is played, and the vision signal of the camera is defeated
Outlet connects the video signal transmission module input, and the video signal transmission module output end connects the video analysis
System input, the video analytic system output end connect described control unit, and the electromagnetic interference equipment sends out electromagnetic wave
The acquisition and transmission of vision signal are interfered.
The vehicle grade video system electromagnetism interference test device of user oriented experience is by using camera to video
The content that playback equipment is played is acquired, and vision signal is sent to video analysis system by video signal transmission module
System is handled, and is then forwarded to control unit and is carried out analysis scoring.The test device is overcome vehicle and cannot be connect using parts
Mouth carries out the difficulty of video signal collection, and solving existing vehicle grade EMS tests can not accurately find and be accurately positioned vehicle-mounted regard
The problem of the electromagnetic compatibility problem of frequency playback equipment realizes video system image quality and electromagnetism interference performance to vehicle
Evaluation test.
In order to avoid video electrical signal is distorted in transmission process due to by electromagnetic interference, video signal transmission module
Including electrooptic conversion module and photoelectric conversion module, the video signal output of the camera connects the electrooptic conversion module
Video electrical signal is converted to video optical signal by input terminal by electrooptic conversion module, and the electrooptic conversion module output end connects
The photoelectric conversion module input terminal is connect, video optical signal is reconverted by video electrical signal by electrooptic conversion module, it is described
Photoelectric conversion module input terminal connects the video analytic system input terminal.
In the present embodiment, microphone can be selected but be not limited to be able to take the special Mikes of EMC of high field radiation
Wind.Audio analysis system can be selected but be not limited to the audio analyzer UPV or Spirent Communications of Rohde ＆ Schwarz Representative Office
NORMAD UX。
Further to avoid video electrical signal from being distorted due to by electromagnetic interference in transmission process, the control is single
Member, video analytic system and photoelectric conversion module are set in EMC control rooms, and the electrooptic conversion module is set to the darkrooms EMC
It is interior.
As the preferred embodiment of the present embodiment, described control unit electromagnetic interference control output end connects the electromagnetic interference
Occurrence of equipment control terminal.Electromagnetic interference occurrence of equipment can be controlled by control unit send different frequency, modulation system and intensity
Electromagnetic interference, realize the test of a variety of situations of electromagnetic interference.
As another preferred embodiment of the present embodiment, as shown in Figs. 3-4, the vehicle grade video system of user oriented experience
System electromagnetism interference test device further includes radio-frequency signal source, and described control unit and radio-frequency signal source communicate to connect, described to penetrate
It is wirelessly connected between frequency source signal and the Vehicular video playback equipment, is wirelessly transferred and is played using OTA, described control unit is logical
It crosses radio-frequency signal source and sends video file to the Vehicular video playback equipment.
When being wirelessly connected between radio-frequency signal source and the Vehicular video playback equipment, which also adds transmitting
Video code flow is modulated in radiofrequency signal by antenna, control unit, and tested vehicle video system will include vehicle-mounted reception antenna
With receiving unit whole system, wherein when analog cellular mobile network video pushes scene, radio-frequency signal source is comprehensive by wirelessly communicating
Instrument and power amplifier composition are surveyed, when analog satellite broadcasting station pushes scene, radio-frequency signal source is by Broadcast signal generator and power amplifier group
At video file information is sent to vehicle video system by transmitting antenna and vehicle-mounted reception antenna, is carried out by receiving unit
It receives, Vehicular video playback equipment plays the video file again, then carries out the whole of user oriented experience using above-mentioned principle
Vehicle grade video system electromagnetism interference evaluation test.
In the present embodiment, control unit can be selected but be not limited to PC machine, tablet computer etc..
The invention also provides a kind of user oriented experience vehicle grade video system electromagnetism interference evaluation test method,
Include the following steps：
S1, controls the Vehicular video playback equipment playing video file, and the camera is to the vision signal that is played
It is acquired to form video electrical signal.
The video electrical signal is converted to video optical signal by electrooptic conversion module in the darkrooms EMC, then passed through by S2
The video optical signal is converted to video electrical signal by the photoelectric conversion module for being set to EMC control rooms.
S3, video analytic system receive the video electrical signal that the photoelectric conversion module is converted, and to the video telecommunication
It number is handled.
S4, control unit receive the video analytic system and send video image and regarding the video image and source file
Processing is compared in frequency frame, obtains the video system experience score in the case of no electromagnetic interference.
S5, control electromagnetic interference occurrence of equipment sends out electromagnetic interference, and executes step S1 to S4, has obtained electromagnetic interference feelings
Video system under condition experiences score.Here the electromagnetism that the electromagnetic interference occurrence of equipment is sent out can be controlled by control unit
The wave band of interference, frequency.
Video system in the case of electromagnetic interference in the case of no electromagnetic interference is experienced score and has electromagnetic interference feelings by S6
Video system experience score in the case of electromagnetic interference under condition is compared, and obtains the variable quantity of score, variable quantity is bigger, then
Interference free performance is weaker, and variable quantity is smaller, then interference free performance is stronger.
When processing is compared with the video frame of source file to video image, video acquisition algorithm can be used, judge to regard
Then the frame losing situation of frequency image and source file judges reception video freeze frame situation, then judge to receive video frame damaged condition,
Assessment score based on video fluency, for judging that video fluency situation, this test method can be to video fluency, videos
Frame damaged condition, video freeze frame situation are made an appraisal.
Following methods can also be used and obtain video system experience score：In the video frame progress to video image and source file
When comparing processing, video acquisition algorithm can be used.The each frame of source file is encoded, the source file being presently processing is defined
Frame be present frame, when present frame use unidirectional spatial predictive encoding when, P frames are obtained, in the process encoded to present frame
In, when the present frame uses two-way spatial predictive encoding or unidirectional spatial predictive encoding, extract each in the current frame image
The motion vector value of original macro with different sizes, is then divided into n*m macro blocks by each original macro, and n, m are
Positive integer, and the motion vector value of divided original macro is assigned to its each n*m macro block being divided into, as n*m macro blocks
Motion vector value.Original macro is usually following several sizes：8*8、8*16、16*8、16*16.Define control unit
I-th of frame image is current frame image in the video image of reception, according to the motion vector of each n*m macro blocks in current frame image
Value calculates the average motion vector value of current frame image, recycles the average motion vector value of current frame image by current frame image
It is determined as non-strenuous exercise's scene.It calculates in current frame image between each n*m macro blocks n*m macro blocks corresponding with source file
Capacity volume variance is distorted according to the weighting coefficient of each n*m macro blocks in capacity volume variance and current frame image using existing energy
ESD algorithms calculate the structure distortion measurement of current frame image.Using the structure for calculating i-th of frame image in the video image received
The identical computational methods of distortion metrics obtain the structure distortion measurement for rebuilding each frame image in video, recycle and rebuild in video
The structure distortion metric calculation of each frame image rebuilds the global structure distortion metrics of video, and global structure distortion metrics are to regard
Display system experiences score.
The vehicle grade video system electromagnetism interference evaluation test method of user oriented experience passes through respectively to whether there is or not electricity
Vision signal in the case of magnetic disturbance is acquired, analyzes, then obtaining the vehicle grade video system by comparison is having electromagnetism dry
In the case of disturbing with no electromagnetic interference in the case of video system experience score variation, according to the size of variation to judgement should
The quality of the electromagnetism interference performance of vehicle grade video system, i.e. variation are big, then interference free performance is weak, and variation is small, then anti-interference
Performance is strong.This method is simple and effective, can fast implement and comment vehicle grade video system image quality and electromagnetism interference performance
Valence is tested.
Wherein, the video file that the Vehicular video playback equipment plays is that local video file or OTA are wirelessly transferred
Video file.
When the video file that the Vehicular video playback equipment plays is the video file of OTA wireless transmissions, the control
Video code flow is modulated on radio-frequency signal source by unit processed, and radio-frequency signal source vehicle-mounted regards in such a way that OTA is wirelessly transferred to described
Frequency playback equipment sends video file.
To further improve the accuracy of vehicle grade video system electromagnetism interference test, described control unit control
The electromagnetic interference occurrence of equipment sends out the electromagnetic interference of assigned frequency, modulation system and intensity, and controls the Vehicular video
Equipment synchronizes playing video file.In no electromagnetic interference and there is the video file played in the case of electromagnetic interference
For identical file.In a preferred embodiment of the present invention, different frequencies can be preset in electromagnetic interference occurrence of equipment
The electromagnetic interference occurring source of rate, modulation system and intensity, can be selected by control unit, specifically for example, by using knob, distant
The form of control or button.
In the present invention, if still wanting to be further analysed the audio of video file, following user oriented bodies can be used
The vehicle grade audio system electromagnetism interference test device tested synchronizes acquisition to audio.
The vehicle grade audio system electromagnetism interference test device of user oriented experience includes control unit, audio analysis
System and electromagnetic interference occurrence of equipment further include microphone and audio signal transmission module.Wherein, control unit, electromagnetism are dry
Disturb occurrence of equipment can be used control unit in the vehicle grade video system electromagnetism interference test device experienced with user oriented,
Electromagnetic interference occurrence of equipment is common.The audio-frequency information acquired is played by the Vehicular video playback equipment for being set to the darkrooms EMC.
The microphone acquires the audio-frequency information that the Vehicular video playback equipment is played, the audio letter of the microphone
Number output end connects the audio signal transmission module input, and the audio signal transmission module output end connects the audio
Analysis system input terminal, the audio analysis system output end connect described control unit, and the electromagnetic interference equipment sends out electricity
Magnetic wave interferes the acquisition and transmission of audio signal.
The vehicle grade audio system electromagnetism interference test device of user oriented experience is by using microphone to audio
The content that playback equipment is played is acquired, and audio signal is sent to audio analysis system by audio signal transmission module
System is handled, and is then forwarded to control unit and is carried out analysis scoring.The test device is overcome vehicle and cannot be connect using parts
Mouth carries out the difficulty of audio signal sample, and solving existing vehicle grade EMS tests can not accurately find and be accurately positioned vehicle-mounted sound
The problem of the electromagnetic compatibility problem of frequency playback equipment realizes audio system audio quality and electromagnetism interference performance to vehicle
Evaluation test.
In order to avoid audio electrical signal is distorted in transmission process due to by electromagnetic interference, audio signal transmission module
Including electrooptic conversion module and photoelectric conversion module, the audio signal output end of the microphone connects the electrooptic conversion module
Audio electrical signal is converted to audio optical signal by input terminal by electrooptic conversion module, and the electrooptic conversion module output end connects
The photoelectric conversion module input terminal is connect, audio optical signal is reconverted by audio electrical signal by electrooptic conversion module, it is described
Photoelectric conversion module input terminal connects the audio analysis system input terminal.
Microphone can be selected but be not limited to be able to take the EMC special cameras of high field radiation.Video analysis
System can be selected but be not limited to the chromatic products of Rohde ＆ Schwarz Representative Office BTC or Spirent Communications.
Further to avoid audio electrical signal from being distorted due to by electromagnetic interference in transmission process, the control is single
Member, audio analysis system and photoelectric conversion module are set in EMC control rooms, and the electrooptic conversion module is set to the darkrooms EMC
It is interior.
Herein in relation to the vehicle grade audio system electromagnetism interference evaluation test method of user oriented experience, including following step
Suddenly：
A, controls the Vehicular video playback equipment playing video file, and the microphone is in the video file that is played
Audio signal be acquired to form audio electrical signal, microphone adopts vision signal the acquisition of audio signal and camera
Both collection are synchronous to carry out.
The audio electrical signal is converted to audio optical signal by electrooptic conversion module in the darkrooms EMC, then passed through by B
The audio optical signal is converted to audio electrical signal by the photoelectric conversion module for being set to EMC control rooms.
C, audio analysis system receive the audio electrical signal that the photoelectric conversion module is converted, and to the audio electrical signal
It is handled.
D, control unit receive the audio analysis system and send audio file and by the sound of the audio file and source file
Processing is compared in frequency frame, obtains the audio system experience score in the case of no electromagnetic interference.
E, control electromagnetic interference occurrence of equipment sends out electromagnetic interference, and executes step A to D, has obtained electromagnetic interference situation
Under audio system experience score.Here it is dry that the electromagnetism that the electromagnetic interference occurrence of equipment is sent out can be controlled by control unit
The wave band disturbed, frequency.
Audio system in the case of electromagnetic interference in the case of no electromagnetic interference is experienced score and has electromagnetic interference feelings by F
Audio system experience score in the case of electromagnetic interference under condition is compared, and obtains the variable quantity of score, variable quantity is bigger, then
Interference free performance is weaker, and variable quantity is smaller, then interference free performance is stronger.
When processing is compared with the audio frame of source file to audio file, the ends PC record audio volume control and utilize psychology
Acoustic algorithms POLQA processing finally obtains the evaluation score of user oriented experience.The processing procedure first of POLQA canonical algorithms
Step is time unifying, it is therefore an objective to signal is divided into frame, to calculate the corresponding time delay of each frame, second step is estimated for sample rate
Meter, third step are simulated " human ear " sense of hearing with sensor model and are reacted the psychological physic of extraneous voice signal, and the 4th with cognition mould
Type calculates final voice quality score value, that is, evaluates score.
This method is by respectively to whether there is or not the audio signals in the case of electromagnetic interference to be acquired, analyzes, then passes through comparison
Obtain the vehicle grade video system in the case where there is electromagnetic interference with no electromagnetic interference in the case of audio signal experience
Divide variation, according to the size of variation to judge the electromagnetism interference performance of the vehicle grade video system in terms of audio signal
Quality, i.e. variation are big, then interference free performance is weak, and variation is small, then strong anti-interference performance.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiments or example in can be combined in any suitable manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of being detached from the principle of the present invention and objective a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The range of invention is limited by claim and its equivalent.
Claims (9)
1. a kind of vehicle grade video system electromagnetism interference test device of user oriented experience, which is characterized in that including control
Unit, video analytic system and electromagnetic interference occurrence of equipment further include the Vehicular video playback equipment for being set to the darkrooms EMC, take the photograph
As head and video signal transmission module；
The camera acquires the content that the Vehicular video playback equipment is played, the video signal output of the camera
The video signal transmission module input is connected, the video signal transmission module output end connects the video analytic system
Input terminal, the video analytic system output end connect described control unit, and the electromagnetic interference equipment sends out electromagnetic wave to vehicle
The acquisition and transmission for carrying video playback apparatus and vision signal are interfered.
2. the vehicle grade video system electromagnetism interference test device of user oriented experience according to claim 1, special
Sign is that the video signal transmission module includes electrooptic conversion module and photoelectric conversion module, the video letter of the camera
Number output end connects the electrooptic conversion module input terminal, and the electrooptic conversion module output end connects the photoelectric conversion module
Input terminal, the photoelectric conversion module input terminal connect the video analytic system input terminal.
3. the vehicle grade video system electromagnetism interference test device of user oriented experience according to claim 2, special
Sign is that described control unit, video analytic system and photoelectric conversion module are set in EMC control rooms, the electro-optic conversion
Module is set in the darkrooms EMC.
4. the vehicle grade video system electromagnetism interference test device of user oriented experience according to claim 1, special
Sign is that described control unit electromagnetic interference control output end connects the electromagnetic interference occurrence of equipment control terminal.
5. the vehicle grade video system electromagnetism interference test device of user oriented experience according to claim 1, special
Sign is, further includes radio-frequency signal source, and described control unit is connect with the radio frequency signal communication, the radio-frequency signal source and institute
OTA is wirelessly connected between stating Vehicular video playback equipment, and the radio-frequency signal source is regarded to Vehicular video playback equipment transmission
Frequency file.
6. a kind of vehicle grade video system electromagnetism interference evaluation test method of user oriented experience, which is characterized in that including
Following steps：
S1, controls the Vehicular video playback equipment playing video file, and the camera carries out the vision signal played
Acquisition forms video electrical signal；
The video electrical signal is converted to video optical signal by electrooptic conversion module in the darkrooms EMC, then passes through setting by S2
The video optical signal is converted into video electrical signal in the photoelectric conversion module of EMC control rooms；
S3, video analytic system receive the video electrical signal that the photoelectric conversion module is converted, and to the video electrical signal into
Row processing；
S4, control unit receive the video analytic system and send video image and by the video frame of the video image and source file
Processing is compared, obtains the video system experience score in the case of no electromagnetic interference；
S5, control electromagnetic interference occurrence of equipment send out electromagnetic interference, and execute step S1 to S4, in the case of having obtained electromagnetic interference
Video system experience score；
S6, by the case of the electromagnetic interference in the case of no electromagnetic interference video system experience score and in the case of having an electromagnetic interference
Electromagnetic interference in the case of video system experience score compared, obtain the variable quantity of score, variable quantity is bigger, then resists dry
Immunity can be weaker, and variable quantity is smaller, then interference free performance is stronger.
7. the vehicle grade video system electromagnetism interference evaluation test method of user oriented experience according to claim 6,
It is characterized in that, the video file that the Vehicular video playback equipment plays is local video file or what OTA was wirelessly transferred regards
Frequency file；
When the video file that the Vehicular video playback equipment plays is the video file of OTA wireless transmissions, the control is single
Video code flow is modulated on radio-frequency signal source by member, and radio-frequency signal source is broadcast in such a way that OTA is wirelessly transferred to the Vehicular video
It puts equipment and sends video file.
8. the vehicle grade video system electromagnetism interference evaluation test method of user oriented experience according to claim 6,
It is characterized in that, described control unit, which controls the electromagnetic interference occurrence of equipment, sends out assigned frequency, modulation system and intensity
Electromagnetic interference, and control the Vehicular video equipment and synchronize playing video file.
9. the vehicle grade video system electromagnetism interference evaluation test method of user oriented experience according to claim 6,
It is characterized in that, being identical file in the video file that no electromagnetic interference and having is played in the case of electromagnetic interference.
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| CN109581076A (en) * | 2018-12-11 | 2019-04-05 | 湘潭大学 | A kind of electromagnetic radiation of mobile telephone prediction technique based on video playing behavior |
| CN110429990A (en) * | 2019-07-08 | 2019-11-08 | 北京汽车股份有限公司 | The EMC testing method and equipment of vehicle-mounted T-Box |
| CN110956791A (en) * | 2019-12-12 | 2020-04-03 | 中国汽车工程研究院股份有限公司 | Electromagnetic field anti-interference performance test system and method for vehicle-mounted emergency call system |
| CN114390158A (en) * | 2021-12-20 | 2022-04-22 | 浙江零跑科技股份有限公司 | Method for inhibiting vehicle-mounted video interference |
| CN115777196A (en) * | 2020-08-13 | 2023-03-10 | 埃尔构人工智能有限责任公司 | Camera testing and verification under electromagnetic interference |
| CN116743989A (en) * | 2023-08-14 | 2023-09-12 | 中国汽车技术研究中心有限公司 | Electromagnetic radiation immunity test system and method for indirect vision device of motor vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581076A (en) * | 2018-12-11 | 2019-04-05 | 湘潭大学 | A kind of electromagnetic radiation of mobile telephone prediction technique based on video playing behavior |
| CN109581076B (en) * | 2018-12-11 | 2021-04-23 | 湘潭大学 | Mobile phone electromagnetic radiation prediction method based on video playing behavior |
| CN110429990A (en) * | 2019-07-08 | 2019-11-08 | 北京汽车股份有限公司 | The EMC testing method and equipment of vehicle-mounted T-Box |
| CN110956791A (en) * | 2019-12-12 | 2020-04-03 | 中国汽车工程研究院股份有限公司 | Electromagnetic field anti-interference performance test system and method for vehicle-mounted emergency call system |
| CN115777196A (en) * | 2020-08-13 | 2023-03-10 | 埃尔构人工智能有限责任公司 | Camera testing and verification under electromagnetic interference |
| CN114390158A (en) * | 2021-12-20 | 2022-04-22 | 浙江零跑科技股份有限公司 | Method for inhibiting vehicle-mounted video interference |
| CN114390158B (en) * | 2021-12-20 | 2024-06-11 | 浙江零跑科技股份有限公司 | Method for inhibiting vehicle-mounted video interference |
| CN116743989A (en) * | 2023-08-14 | 2023-09-12 | 中国汽车技术研究中心有限公司 | Electromagnetic radiation immunity test system and method for indirect vision device of motor vehicle |
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