CN107124239A - A kind of vehicle-mounted middle control frequency interference source detection method - Google Patents
A kind of vehicle-mounted middle control frequency interference source detection method Download PDFInfo
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- CN107124239A CN107124239A CN201710266049.5A CN201710266049A CN107124239A CN 107124239 A CN107124239 A CN 107124239A CN 201710266049 A CN201710266049 A CN 201710266049A CN 107124239 A CN107124239 A CN 107124239A
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- vehicle device
- programmable power
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- interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/345—Interference values
Abstract
The invention discloses the vehicle-mounted middle control frequency interference source detection method of one kind, including：Devices to test is placed in screened room, the power supply of vehicle device system is connected, vehicle device system includes master controller, radio module, storage peripheral hardware, 1 ~ N of module 1,1 ~ N of programmable power supply and system storage；Vehicle device system carries out the interference of radio reception frequency and searches scanning, obtains the full range spot scan data that full range point prescanned data and vehicle device system before 1 ~ N of vehicle device system closing programmable power supply sequentially close each time after 1 ~ N of programmable power supply；Full range point prescanned data and the full range point prescanned data of each time are compared vehicle device system, to orient interference source.The influence that the automatically derived each module of energy of the invention is tested frequency, so as to during radio performance test, interference source just can be rapidly and accurately found without frequently taking out to take apart from shielding environment, operation is simpler, more rapidly, lower is required to test environment and vehicle device is hardly damaged, testing field is can be widely applied to.
Description
Technical field
The present invention relates to testing field, especially a kind of vehicle-mounted middle control frequency interference source detection method.
Background technology
It is well known that vehicle-mounted market is different from general consumption market, vehicle-mounted product is to the reliability of each device and durable
Property require general all relatively stricter, therefore the state-of-art in vehicle-mounted market far lags behind the production of ordinary consumption electron-like at this stage
Product, particularly in preceding dress automotive field.With the rise of smart machine, the public constantly carries for the experience requirements of vehicle-mounted product
Height, the notice of each side starts to focus to vehicle-mounted market.
Current preceding entrucking is controlled in carrying（That is vehicle device system）Superheterodyne radio set typically is used, in development engineer
Shielding house need to be frequently passed in and out to test its property indices.Particularly for the detection of interference source, the frequency of radio compared with
It is low, there are many DC-DC power sources inside vehicle device, and many integration modules are employed in body, thus such broadband noise is difficult
It is identified near field probes.In this regard, existing solution is Hardware Engineer first obtains complete according to audio analyzer test
Frequency signal to noise ratio test result, then vehicle device is taken out, rule of thumb weld or retract phase with full range point signal to noise ratio test result
The device answered, then assembling is put into shielding house to test, and so operates to lock final interference source repeatedly.It is this by frequent
The radio performance test mode taking out and take apart from shielding environment, it is cumbersome, take it is longer, to test environment requirement compared with
Height, and the frequent mode for tearing machine open is easily damaged vehicle device, it would be highly desirable to further improve and improve.
The content of the invention
In order to solve the above technical problems, it is an object of the invention to：There is provided a kind of operation it is simple, quick, to test environment
It is required that low and be hardly damaged vehicle device, vehicle-mounted middle control frequency interference source detection method.
The technical solution used in the present invention is：
A kind of vehicle-mounted middle control frequency interference source detection method, comprises the following steps：
Devices to test is placed in screened room, the power supply of vehicle device system is connected, wherein, vehicle device system includes master controller, radio reception
Module, storage peripheral hardware, 1 ~ N-1 of module, 1 ~ N of programmable power supply and system storage, N are the sum of programmable power supply, 1 ~ N-1 points of module
Do not connected one to one with 1 ~ N-1 of programmable power supply, programmable power supply N is connected with system storage；
Vehicle device system carries out the interference of radio reception frequency and searches scanning, and the full range point obtained before 1 ~ N of vehicle device system closing programmable power supply is pre-
Scan data and vehicle device system sequentially close the full range spot scan data of each time after 1 ~ N of programmable power supply；
Full range point prescanned data and the full range point prescanned data of each time are compared vehicle device system, dry to orient
Disturb source.
Further, the vehicle device system carries out the interference of radio reception frequency and searches scanning, obtains vehicle device system and closes programmable power supply 1
Full range point prescanned data and vehicle device system before ~ N sequentially close each time after 1 ~ N of programmable power supply full range spot scan data this
One step, it includes：
Vehicle device system selects a kind of pattern as radio reception frequency from FM patterns, AM patterns and FM+AM patterns these three preset modes
Point interference search pattern；
Scanning is searched in the radio reception frequency interference that vehicle device system carries out corresponding modes according to the pattern of selection, obtains the closing of vehicle device system
Full range point prescanned data and vehicle device system before 1 ~ N of programmable power supply sequentially close the full range point of each time after 1 ~ N of programmable power supply
Scan data.
Further, scanning is searched in the radio reception frequency interference that the vehicle device system carries out corresponding modes according to the pattern of selection,
Obtain full range point prescanned data that vehicle device system closed before programmable power supply 1 ~ N and vehicle device system sequentially close programmable power supply 1 ~
After N the step for the full range spot scan data of each time, it includes：
S11, vehicle device system carry out FM full ranges point prescan by radio module automatically according to the FM patterns of selection, and will be measured
FM full ranges point prescanned data be cached in system storage；
S12, initialized, current power is used as using programmable power supply 1；
S13, vehicle device system carry out the FM full range spot scans under present case by radio module, and the FM under present case is complete
Frequency point scanning data buffer storage into system storage, wherein, present case is that current power is closed and other non-present power supplys
The situation that programmable power supply is opened；
S14, judge whether current power is programmable power supply N, if so, then terminating the interference of radio reception frequency searches scanning process, conversely,
Then using next programmable power supply as current power and return to step S13.
Further, scanning is searched in the radio reception frequency interference that the vehicle device system carries out corresponding modes according to the pattern of selection,
Obtain full range point prescanned data that vehicle device system closed before programmable power supply 1 ~ N and vehicle device system sequentially close programmable power supply 1 ~
After N the step for the full range spot scan data of each time, it includes：
S21, vehicle device system carry out AM full ranges point prescan by radio module automatically according to the AM patterns of selection, and will be measured
AM full ranges point prescanned data be cached in system storage；
S22, initialized, current power is used as using programmable power supply 1；
S23, vehicle device system carry out the AM full range spot scans under present case by radio module, and the AM under present case is complete
Frequency point scanning data buffer storage into system storage, wherein, present case is that current power is closed and other non-present power supplys
The situation that programmable power supply is opened；
S24, judge whether current power is programmable power supply N, if so, then terminating the interference of radio reception frequency searches scanning process, conversely,
Then using next programmable power supply as current power and return to step S23.
Further, scanning is searched in the radio reception frequency interference that the vehicle device system carries out corresponding modes according to the pattern of selection,
Obtain full range point prescanned data that vehicle device system closed before programmable power supply 1 ~ N and vehicle device system sequentially close programmable power supply 1 ~
After N the step for the full range spot scan data of each time, it includes：
S31, vehicle device system carry out FM full ranges point prescan by radio module automatically according to the FM+AM patterns of selection, and by institute
The FM full ranges point prescanned data measured is cached in system storage；
S32, progress FM mode initialisations, FM pattern current powers are used as using programmable power supply 1；
S33, vehicle device system carry out the FM full range spot scans under FM pattern present cases by radio module, and FM patterns is current
FM full range spot scan data buffer storages under situation into system storage, wherein, FM patterns present case be FM patterns it is currently electric
The situation that the programmable power supply of source closing and other non-FM patterns current powers is opened；
S34, judge whether FM patterns current power is programmable power supply N, if so, step S35 is then performed, conversely, then with next journey
Power supply is controlled as FM patterns current power and return to step S33；
S35, vehicle device system carry out AM full ranges point prescan by radio module automatically, and by measured AM full ranges point prescan
Data buffer storage is into system storage；
S36, progress AM mode initialisations, AM pattern current powers are used as using programmable power supply 1；
S37, vehicle device system carry out the AM full range spot scans under AM pattern present cases by radio module, and AM patterns is current
AM full ranges point prescanned data under situation is cached in system storage, wherein, AM patterns present case is that AM patterns are current
The situation that the programmable power supply of power-off and other non-AM patterns current powers is opened；
S38, judge whether current power is programmable power supply N, if so, then terminating the interference of radio reception frequency searches scanning process, conversely,
Then using next programmable power supply as AM patterns current power and return to step S37.
Further, full range point prescanned data and the full range point prescanned data of each time are compared the vehicle device system
Analysis, the step for orient interference source, it includes：
Vehicle device system calculates each programmable power supply according to full range point prescanned data and the full range point prescanned data of each time and closed respectively
The interference value situation of change of frequency is disturbed after closing；
The interference value situation of change of interference frequency determines to disturb the interference source of frequency after vehicle device system is closed according to each programmable power supply.
Further, the interference value situation of change of interference frequency determines dry after the vehicle device system is closed according to each programmable power supply
The step for scrambling the interference source of point, it includes：
S41, judge any programmable power supply in 1 ~ N of programmable power supply after closing the interference values of all interference frequencies whether do not become
Change, if so, then judging master controller as unique interference source；Conversely, then performing step S42；
S42, judge that current programmable power supply partly disturbs the interference value of frequency whether constant after closing, if so, then judging to work as future
The module controlled corresponding to power supply is not interference source；Conversely, then judging the module corresponding to current programmable power supply partly to disturb frequency
The interference source of point in the lump performs step after the interference value decreasing value that frequency is partly disturbed after current programmable power supply is closed is recorded
S43；Wherein, current programmable power supply is any programmable power supply in 1 ~ N of programmable power supply, and the module corresponding to current programmable power supply is
Module corresponding with current programmable power supply in 1 ~ N of module, part interference frequency is some in all interference frequencies or a few
Individual frequency；
Partly disturb whether the interference value decreasing value sum of all interference sources of frequency reaches setting in S43,1 ~ N of judge module
Threshold value, if so, then judging that master controller is not one of interference source of part interference frequency, conversely, then judging that master controller is also
One of interference source of part interference frequency.
Further, step S44, the step S44 are additionally provided with after the step S43 is specially：By each interference frequency
And respectively the corresponding all interference sources of interference frequency are stored in the form of form.
Further, in addition to by the testing result of interference source the step of vehicle-mounted middle control screen is shown.
Further, in addition to by the step in testing result storage to the storage peripheral hardware of interference source.
The beneficial effects of the invention are as follows：Including Devices to test is placed in screened room and the power supply of vehicle device system, car is connected
Machine system, which carries out the interference of radio reception frequency, searches scanning and vehicle device system and sweeps full range point prescanned data and the full range point of each time in advance
Retouch the step of data are compared, the whole radio reception frequency range of first prescan vehicle device system obtains full range point prescan number
According to, then sequentially close the programmable power supply of each module, and the whole radio reception frequency range of scanning vehicle device system is obtained each time successively
Full range point prescanned data and the full range spot scan data of each time are compared minute full range spot scan data, last vehicle device system
Analysis, the influence that automatically derived each module is tested frequency, so that during radio performance test, without frequently from shading ring
Take out to take apart in border and just can rapidly and accurately find interference source, operate simpler, more rapidly, lower and not is required to test environment
Fragile vehicle device.
Brief description of the drawings
Fig. 1 is a kind of overall flow figure of vehicle-mounted middle control frequency interference source detection method of the present invention；
Fig. 2 is the structured flowchart of vehicle device system of the present invention；
Fig. 3 disturbs the particular flow sheet of search pattern for three kinds of vehicle device radio reception frequencies of the present invention.
Embodiment
Referring to Figures 1 and 2, a kind of vehicle-mounted middle control frequency interference source detection method, comprises the following steps：
Devices to test is placed in screened room, the power supply of vehicle device system is connected, wherein, vehicle device system includes master controller, radio reception
Module, storage peripheral hardware, 1 ~ N-1 of module, 1 ~ N of programmable power supply and system storage, N are the sum of programmable power supply, 1 ~ N-1 points of module
Do not connected one to one with 1 ~ N-1 of programmable power supply, programmable power supply N is connected with system storage；
Vehicle device system carries out the interference of radio reception frequency and searches scanning, and the full range point obtained before 1 ~ N of vehicle device system closing programmable power supply is pre-
Scan data and vehicle device system sequentially close the full range spot scan data of each time after 1 ~ N of programmable power supply；
Full range point prescanned data and the full range point prescanned data of each time are compared vehicle device system, dry to orient
Disturb source.
Wherein, 1 ~ N-1 of module connects one to one with 1 ~ N-1 of programmable power supply respectively, refers to that module 1 connects with programmable power supply 1
Connect, refer to module 2 and be connected with programmable power supply 2 ... ..., module N-1 is connected with programmable power supply N-1.
Reference picture 3, is further used as preferred embodiment, and the vehicle device system carries out the interference lookup of radio reception frequency and swept
Retouch, obtain full range point prescanned data and vehicle device system before 1 ~ N of vehicle device system closing programmable power supply and sequentially close program-controlled electric
After 1 ~ N of source the step for the full range spot scan data of each time, it includes：
Vehicle device system selects a kind of pattern as radio reception frequency from FM patterns, AM patterns and FM+AM patterns these three preset modes
Point interference search pattern；
Scanning is searched in the radio reception frequency interference that vehicle device system carries out corresponding modes according to the pattern of selection, obtains the closing of vehicle device system
Full range point prescanned data and vehicle device system before 1 ~ N of programmable power supply sequentially close the full range point of each time after 1 ~ N of programmable power supply
Scan data.
Reference picture 3, is further used as preferred embodiment, and the vehicle device system carries out respective mode according to the pattern of selection
Scanning is searched in the radio reception frequency interference of formula, obtain full range point prescanned data that vehicle device system closed before programmable power supply 1 ~ N and
The step for vehicle device system sequentially closes the full range spot scan data of each time after 1 ~ N of programmable power supply, it includes：
S11, vehicle device system carry out FM full ranges point prescan by radio module automatically according to the FM patterns of selection, and will be measured
FM full ranges point prescanned data be cached in system storage；
S12, initialized, current power is used as using programmable power supply 1；
S13, vehicle device system carry out the FM full range spot scans under present case by radio module, and the FM under present case is complete
Frequency point scanning data buffer storage into system storage, wherein, present case is that current power is closed and other non-present power supplys
The situation that programmable power supply is opened；
S14, judge whether current power is programmable power supply N, if so, then terminating the interference of radio reception frequency searches scanning process, conversely,
Then using next programmable power supply as current power and return to step S13.
Reference picture 3, is further used as preferred embodiment, and the vehicle device system carries out respective mode according to the pattern of selection
Scanning is searched in the radio reception frequency interference of formula, obtain full range point prescanned data that vehicle device system closed before programmable power supply 1 ~ N and
The step for vehicle device system sequentially closes the full range spot scan data of each time after 1 ~ N of programmable power supply, it includes：
S21, vehicle device system carry out AM full ranges point prescan by radio module automatically according to the AM patterns of selection, and will be measured
AM full ranges point prescanned data be cached in system storage；
S22, initialized, current power is used as using programmable power supply 1；
S23, vehicle device system carry out the AM full range spot scans under present case by radio module, and the AM under present case is complete
Frequency point scanning data buffer storage into system storage, wherein, present case is that current power is closed and other non-present power supplys
The situation that programmable power supply is opened；
S24, judge whether current power is programmable power supply N, if so, then terminating the interference of radio reception frequency searches scanning process, conversely,
Then using next programmable power supply as current power and return to step S23.
Reference picture 3, is further used as preferred embodiment, and the vehicle device system carries out respective mode according to the pattern of selection
Scanning is searched in the radio reception frequency interference of formula, obtain full range point prescanned data that vehicle device system closed before programmable power supply 1 ~ N and
The step for vehicle device system sequentially closes the full range spot scan data of each time after 1 ~ N of programmable power supply, it includes：
S31, vehicle device system carry out FM full ranges point prescan by radio module automatically according to the FM+AM patterns of selection, and by institute
The FM full ranges point prescanned data measured is cached in system storage；
S32, progress FM mode initialisations, FM pattern current powers are used as using programmable power supply 1；
S33, vehicle device system carry out the FM full range spot scans under FM pattern present cases by radio module, and FM patterns is current
FM full range spot scan data buffer storages under situation into system storage, wherein, FM patterns present case be FM patterns it is currently electric
The situation that the programmable power supply of source closing and other non-FM patterns current powers is opened；
S34, judge whether FM patterns current power is programmable power supply N, if so, step S35 is then performed, conversely, then with next journey
Power supply is controlled as FM patterns current power and return to step S33；
S35, vehicle device system carry out AM full ranges point prescan by radio module automatically, and by measured AM full ranges point prescan
Data buffer storage is into system storage；
S36, progress AM mode initialisations, AM pattern current powers are used as using programmable power supply 1；
S37, vehicle device system carry out the AM full range spot scans under AM pattern present cases by radio module, and AM patterns is current
AM full ranges point prescanned data under situation is cached in system storage, wherein, AM patterns present case is that AM patterns are current
The situation that the programmable power supply of power-off and other non-AM patterns current powers is opened；
S38, judge whether current power is programmable power supply N, if so, then terminating the interference of radio reception frequency searches scanning process, conversely,
Then using next programmable power supply as AM patterns current power and return to step S37.
It is further used as preferred embodiment, the vehicle device system is by full range point prescanned data and the full range point of each time
Prescanned data is compared, the step for orient interference source, and it includes：
Vehicle device system calculates each programmable power supply according to full range point prescanned data and the full range point prescanned data of each time and closed respectively
The interference value situation of change of frequency is disturbed after closing；
The interference value situation of change of interference frequency determines to disturb the interference source of frequency after vehicle device system is closed according to each programmable power supply.
It is further used as preferred embodiment, interference frequency is dry after the vehicle device system is closed according to each programmable power supply
The step for value changes situation determines the interference source of interference frequency is disturbed, it includes：
S41, judge any programmable power supply in 1 ~ N of programmable power supply after closing the interference values of all interference frequencies whether do not become
Change, if so, then judging master controller as unique interference source；Conversely, then performing step S42；
S42, judge that current programmable power supply partly disturbs the interference value of frequency whether constant after closing, if so, then judging to work as future
The module controlled corresponding to power supply is not interference source；Conversely, then judging the module corresponding to current programmable power supply partly to disturb frequency
The interference source of point in the lump performs step after the interference value decreasing value that frequency is partly disturbed after current programmable power supply is closed is recorded
S43；Wherein, current programmable power supply is any programmable power supply in 1 ~ N of programmable power supply, and the module corresponding to current programmable power supply is
Module corresponding with current programmable power supply in 1 ~ N of module, part interference frequency is some in all interference frequencies or a few
Individual frequency；
Partly disturb whether the interference value decreasing value sum of all interference sources of frequency reaches setting in S43,1 ~ N of judge module
Threshold value, if so, then judging that master controller is not one of interference source of part interference frequency, conversely, then judging that master controller is also
One of interference source of part interference frequency.
It is further used as preferred embodiment, step S44, the step S44 tools being additionally provided with after the step S43
Body is：Each interference frequency and the corresponding all interference sources of each interference frequency are stored in the form of form.
It is further used as preferred embodiment, in addition to the testing result of interference source is shown in vehicle-mounted middle control screen
The step of showing.
It is further used as preferred embodiment, in addition to by the step in testing result storage to the storage peripheral hardware of interference source
Suddenly.
The present invention is further explained and illustrated with reference to Figure of description and specific embodiment.
Embodiment one
For existing vehicle-mounted middle control（That is vehicle device system）Need frequently to take out and take apart to carry out radio from shielding environment
The problems of mode that can be tested, the present embodiment proposes a kind of new vehicle-mounted middle control frequency interference source detection method.Should
The vehicle-mounted middle control of method is first swept whole radio reception frequency range frequency spectrum and cached, then sequentially closed in advance by the Three models of system intialization
Close the programmable power supply of each module, and the scanning whole frequency range frequency spectrum of radio reception and cached successively, last vehicle device system is by pre- frequency sweep
Compose and be compared with each frequency spectrum cached, the influence that automatically derived each module is tested frequency, so as to be quickly and accurately positioned
Go out interference source.
The method of the present embodiment is when vehicle device requires to look up interference source in radio reception testing performance index, and user passes through vehicle device system
The touch screen operation instruction of system enters frequency interference source search pattern, and vehicle device system can be in the default three kinds of frequencies interference of user interface
Source search pattern, respectively FM patterns, AM patterns and FM+AM patterns.
The structure of the vehicle device system of the present embodiment is as shown in Fig. 2 including master controller, radio module, storage peripheral hardware, module
1 ~ N-1,1 ~ N of programmable power supply, system storage and other modules, wherein, master controller controls 1 ~ N of programmable power supply by program
Break-make, and then the break-make of 1 ~ N-1 of control module and system storage power supply.System storage can be realized using EPROM.
Radio module, for carrying out radio reception performance test.Peripheral hardware is stored, the result data for storing detection.Other modules, including it is defeated
Enter the modules such as module.
The interference source detection method of the present embodiment to implement process as follows：
（1）Devices to test is placed among screened room, power supply is connected.
Devices to test can get up more as some or certain several modules in 1 ~ N-1 of vehicle device system module, so test
It is convenient.
（2）Input instruction enters test pattern in the vehicle device system shown in Fig. 2, and selects the interference of vehicle device radio reception frequency to look into
Look for pattern（The implementation process figure of the pattern is as shown in figure 3, user can be as required from FM patterns, AM patterns and FM+AM patterns
Select a kind of preset mode）.As shown in figure 3, exemplified by selecting FM+AM patterns, vehicle device system starts with the radio reception mould of itself
Block carries out FM full ranges point prescan automatically, and by measured full range point prescanned data（The prescan of i.e. whole radio reception frequency range
Frequency spectrum）System storage is cached in, programmable power supply 1 is then shut off, the spot scan of FM full ranges is carried out again and corresponding data are stored；
Then, programmable power supply 2 is closed, the spot scan of FM full ranges is carried out again and corresponding data ... are stored so moving in circles operation extremely
FM full range spot scans after programmable power supply N is closed are finished, and now vehicle device system automatically switches to AM patterns and carries out full range point test,
The full range point AM full range spot scan modes for sequentially closing programmable power supply are similarly taken, until the AM full ranges after programmable power supply N closings
Spot scan is finished.Vehicle device system then the full range point data transferred respectively under FM/AM patterns is compared, and store ratio
To the result of analysis.
（3）Storage is finished, and the result of detection will be shown in the display screen of vehicle-mounted middle control, and as needed, the present embodiment
The result of detection can also click on store function to storing peripheral hardware.The whole process of the present embodiment is all performed entirely automatically
's.
And FM patterns are identical with the principle of FM+AM patterns with the vehicle device radio reception frequency interference lookup principle of AM patterns.
And the general principle that the present embodiment is compared is：It is complete after the corresponding module of some programmable power supply by closing
Full range point test data when frequency test data is with complete machine normal work（That is full range point prescanned data）Carry out difference contrast, example
Such as：Reduce if turned off some or some interference values for disturbing frequency after the corresponding module 1 of programmable power supply 1, then can confirm that mould
Block 1 is one of interference source of this or these interference frequency, and if turned off after the corresponding module 1 of programmable power supply 1 these disturb
The interference value of frequency does not change, then specification module 1 is not interference source, can similar method analyze whether other modules are dry
Disturb source.If sequentially having compared after module 1 is closed to module N partly disturbs the interference value of frequency to reduce but not up to standard
（The interference value decreasing value sum of i.e. all interference sources is not up to the threshold value of setting）, then it is also part noise spot to illustrate master controller
One of interference source, and if discovery after sequentially having compared, all interference frequencies after each module of the module 1 into module N is closed
Interference value all do not change, then illustrate master controller be these interference frequencies unique interference source.Finally, can be soft by analyzing
Part shows all interference sources of all interference frequencies in the form of form.
The present invention is controlled and outputed test result by the software of master controller when analyzing radio reception frequency interference source, is not required to
Machine is torn open, it is not required that the equipment such as extra audio analyzer, frequency spectrograph and near field probes, after a wheel full range spot scan has been tested
Single or multiple interference sources can be just accurately positioned out, testing efficiency is high, and testing cost is low, and test result equally can be used for
Aid in vehicle device EMI analysis.
Above is the preferable implementation to the present invention is illustrated, but the present invention is not limited to the embodiment, ripe
A variety of equivalent variations or replacement can also be made on the premise of without prejudice to spirit of the invention by knowing those skilled in the art, this
Equivalent deformation or replacement are all contained in the application claim limited range a bit.
Claims (10)
1. a kind of vehicle-mounted middle control frequency interference source detection method, it is characterised in that：Comprise the following steps：
Devices to test is placed in screened room, the power supply of vehicle device system is connected, wherein, vehicle device system includes master controller, radio reception
Module, storage peripheral hardware, 1 ~ N-1 of module, 1 ~ N of programmable power supply and system storage, N are the sum of programmable power supply, 1 ~ N-1 points of module
Do not connected one to one with 1 ~ N-1 of programmable power supply, programmable power supply N is connected with system storage；
Vehicle device system carries out the interference of radio reception frequency and searches scanning, and the full range point obtained before 1 ~ N of vehicle device system closing programmable power supply is pre-
Scan data and vehicle device system sequentially close the full range spot scan data of each time after 1 ~ N of programmable power supply；
Full range point prescanned data and the full range point prescanned data of each time are compared vehicle device system, dry to orient
Disturb source.
2. the vehicle-mounted middle control frequency interference source detection method of one kind according to claim 1, it is characterised in that：The vehicle device system
System carries out the interference of radio reception frequency and searches scanning, obtain full range point prescanned data that vehicle device system closed before 1 ~ N of programmable power supply with
And vehicle device system, the step for sequentially close the full range spot scan data of each time after 1 ~ N of programmable power supply, it includes：
Vehicle device system selects a kind of pattern as radio reception frequency from FM patterns, AM patterns and FM+AM patterns these three preset modes
Point interference search pattern；
Scanning is searched in the radio reception frequency interference that vehicle device system carries out corresponding modes according to the pattern of selection, obtains the closing of vehicle device system
Full range point prescanned data and vehicle device system before 1 ~ N of programmable power supply sequentially close the full range point of each time after 1 ~ N of programmable power supply
Scan data.
3. the vehicle-mounted middle control frequency interference source detection method of one kind according to claim 2, it is characterised in that：The vehicle device system
Unite according to the pattern of selection carry out corresponding modes radio reception frequency interference search scanning, obtain vehicle device system close programmable power supply 1 ~
Full range point prescanned data and vehicle device system before N sequentially close each time after 1 ~ N of programmable power supply full range spot scan data this
One step, it includes：
S11, vehicle device system carry out FM full ranges point prescan by radio module automatically according to the FM patterns of selection, and will be measured
FM full ranges point prescanned data be cached in system storage；
S12, initialized, current power is used as using programmable power supply 1；
S13, vehicle device system carry out the FM full range spot scans under present case by radio module, and the FM under present case is complete
Frequency point scanning data buffer storage into system storage, wherein, present case is that current power is closed and other non-present power supplys
The situation that programmable power supply is opened；
S14, judge whether current power is programmable power supply N, if so, then terminating the interference of radio reception frequency searches scanning process, conversely,
Then using next programmable power supply as current power and return to step S13.
4. the vehicle-mounted middle control frequency interference source detection method of one kind according to claim 2, it is characterised in that：The vehicle device system
Unite according to the pattern of selection carry out corresponding modes radio reception frequency interference search scanning, obtain vehicle device system close programmable power supply 1 ~
Full range point prescanned data and vehicle device system before N sequentially close each time after 1 ~ N of programmable power supply full range spot scan data this
One step, it includes：
S21, vehicle device system carry out AM full ranges point prescan by radio module automatically according to the AM patterns of selection, and will be measured
AM full ranges point prescanned data be cached in system storage；
S22, initialized, current power is used as using programmable power supply 1；
S23, vehicle device system carry out the AM full range spot scans under present case by radio module, and the AM under present case is complete
Frequency point scanning data buffer storage into system storage, wherein, present case is that current power is closed and other non-present power supplys
The situation that programmable power supply is opened；
S24, judge whether current power is programmable power supply N, if so, then terminating the interference of radio reception frequency searches scanning process, conversely,
Then using next programmable power supply as current power and return to step S23.
5. the vehicle-mounted middle control frequency interference source detection method of one kind according to claim 2, it is characterised in that：The vehicle device system
Unite according to the pattern of selection carry out corresponding modes radio reception frequency interference search scanning, obtain vehicle device system close programmable power supply 1 ~
Full range point prescanned data and vehicle device system before N sequentially close each time after 1 ~ N of programmable power supply full range spot scan data this
One step, it includes：
S31, vehicle device system carry out FM full ranges point prescan by radio module automatically according to the FM+AM patterns of selection, and by institute
The FM full ranges point prescanned data measured is cached in system storage；
S32, progress FM mode initialisations, FM pattern current powers are used as using programmable power supply 1；
S33, vehicle device system carry out the FM full range spot scans under FM pattern present cases by radio module, and FM patterns is current
FM full range spot scan data buffer storages under situation into system storage, wherein, FM patterns present case be FM patterns it is currently electric
The situation that the programmable power supply of source closing and other non-FM patterns current powers is opened；
S34, judge whether FM patterns current power is programmable power supply N, if so, step S35 is then performed, conversely, then with next journey
Power supply is controlled as FM patterns current power and return to step S33；
S35, vehicle device system carry out AM full ranges point prescan by radio module automatically, and by measured AM full ranges point prescan
Data buffer storage is into system storage；
S36, progress AM mode initialisations, AM pattern current powers are used as using programmable power supply 1；
S37, vehicle device system carry out the AM full range spot scans under AM pattern present cases by radio module, and AM patterns is current
AM full ranges point prescanned data under situation is cached in system storage, wherein, AM patterns present case is that AM patterns are current
The situation that the programmable power supply of power-off and other non-AM patterns current powers is opened；
S38, judge whether current power is programmable power supply N, if so, then terminating the interference of radio reception frequency searches scanning process, conversely,
Then using next programmable power supply as AM patterns current power and return to step S37.
6. the vehicle-mounted middle control frequency interference source detection method of one kind according to claim 1, it is characterised in that：The vehicle device system
Unite and full range point prescanned data and the full range point prescanned data of each time are compared, to orient interference source this step
Suddenly, it includes：
Vehicle device system calculates each programmable power supply according to full range point prescanned data and the full range point prescanned data of each time and closed respectively
The interference value situation of change of frequency is disturbed after closing；
The interference value situation of change of interference frequency determines to disturb the interference source of frequency after vehicle device system is closed according to each programmable power supply.
7. the vehicle-mounted middle control frequency interference source detection method of one kind according to claim 6, it is characterised in that：The vehicle device system
Unite according to the step for the interference source of interference value situation of change determination interference frequency that frequency is disturbed after the closing of each programmable power supply, its
Including：
S41, judge any programmable power supply in 1 ~ N of programmable power supply after closing the interference values of all interference frequencies whether do not become
Change, if so, then judging master controller as unique interference source；Conversely, then performing step S42；
S42, judge that current programmable power supply partly disturbs the interference value of frequency whether constant after closing, if so, then judging to work as future
The module controlled corresponding to power supply is not interference source；Conversely, then judging the module corresponding to current programmable power supply partly to disturb frequency
The interference source of point in the lump performs step after the interference value decreasing value that frequency is partly disturbed after current programmable power supply is closed is recorded
S43；Wherein, current programmable power supply is any programmable power supply in 1 ~ N of programmable power supply, and the module corresponding to current programmable power supply is
Module corresponding with current programmable power supply in 1 ~ N of module, part interference frequency is some in all interference frequencies or a few
Individual frequency；
Partly disturb whether the interference value decreasing value sum of all interference sources of frequency reaches setting in S43,1 ~ N of judge module
Threshold value, if so, then judging that master controller is not one of interference source of part interference frequency, conversely, then judging that master controller is also
One of interference source of part interference frequency.
8. the vehicle-mounted middle control frequency interference source detection method of one kind according to claim 7, it is characterised in that：In the step
Step S44, the step S44 are additionally provided with after S43 is specially：By each interference frequency and the corresponding all interference of each interference frequency
Source is stored in the form of form.
9. a kind of vehicle-mounted middle control frequency interference source detection method according to claim any one of 1-8, it is characterised in that：Also
Including by the testing result of interference source it is vehicle-mounted it is middle control screen shown the step of.
10. a kind of vehicle-mounted middle control frequency interference source detection method according to claim any one of 1-8, it is characterised in that：
Also include the step in testing result storage to the storage peripheral hardware of interference source.
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