CN104614606B - A kind of method and device for detecting electromagnetic interference equipment - Google Patents
A kind of method and device for detecting electromagnetic interference equipment Download PDFInfo
- Publication number
- CN104614606B CN104614606B CN201510034098.7A CN201510034098A CN104614606B CN 104614606 B CN104614606 B CN 104614606B CN 201510034098 A CN201510034098 A CN 201510034098A CN 104614606 B CN104614606 B CN 104614606B
- Authority
- CN
- China
- Prior art keywords
- equipment
- signal
- frequency
- electromagnetic interference
- sequence
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000009467 reduction Effects 0.000 claims abstract description 43
- 238000012545 processing Methods 0.000 claims description 9
- 230000010354 integration Effects 0.000 claims description 5
- 230000005611 electricity Effects 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000005855 radiation Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
Landscapes
- Noise Elimination (AREA)
Abstract
The invention discloses a kind of method and device for detecting electromagnetic interference equipment, main technical schemes include：Outer signals after standard sequence is modulated with reception are scrambled, and are demodulated into reduction sequence；If the reduction sequence is more than signal intensity of the standard sequence on the frequency in the signal intensity of n-th frequency, judge electromagnetic interference be present on the frequency；The equipment sequence of each external equipment of operating conditions is obtained, obtains signal intensity of each external equipment on the frequency, determines that the external equipment that signal intensity is maximum on the frequency is jamming equipment.Using the technical scheme, solve the problems, such as that presence not can determine that electromagnetic interference equipment according to electromagnetic interference signal in the prior art.
Description
Technical field
The present invention relates to Smart Home technical field, more particularly relates to a kind of method and dress for detecting electromagnetic interference equipment
Put.
Background technology
Electromagnetic interference EMI (Electromagnetic Interference), it is to influence electronic product performance and stability
An important indicator, international standard and national standard all propose strict requirements to the electromagnetic compatibility of electronic product：It is same
Each electronic equipment in electromagnetic environment all should be able to normal work without interfering with each other, and electromagnetic interference can not be to human body
And environmental concerns.But with becoming increasingly abundant for domestic electric appliance, electromagnetic interference is overlapped mutually between different electrical equipment, makes me
Residing electromagnetic environment it is increasingly complicated, the working condition and user's body health to our equipment are very unfavorable.
Current safeguard procedures, it is more to wear isolation clothes etc., but effect is unsatisfactory for this problem.Existing skill
The problem of not can determine that electromagnetic interference equipment according to electromagnetic interference signal in art be present.
The content of the invention
The embodiment of the present invention provides a kind of method and device for detecting electromagnetic interference equipment, to solve to deposit in the prior art
Not can determine that electromagnetic interference equipment according to electromagnetic interference signal the problem of.
The embodiment of the present invention provides a kind of method for detecting electromagnetic interference equipment, and this method includes：
Outer signals after standard sequence is modulated with reception are scrambled, and are demodulated into reduction sequence；
If the reduction sequence is more than signal of the standard sequence on the frequency in the signal intensity of n-th frequency
Intensity, then judge electromagnetic interference be present on the frequency；
The equipment sequence of each external equipment of operating conditions is obtained, it is strong to obtain signal of each external equipment on the frequency
Degree, determine that the external equipment that signal intensity is maximum on the frequency is jamming equipment.
It is preferred that after the external equipment for determining that signal intensity is maximum on the frequency is jamming equipment, in addition to：
By the jamming equipment the operating conditions of signal intensity and the jamming equipment of the frequency signal intensity ratio
Compared with determining the working condition of the jamming equipment.
It is preferred that it is described standard sequence is modulated after be overlapped with the outer signals of reception and be demodulated into reduction sequence bag
Include：
By the standard sequence by modulators modulate into the signal for meeting digital television demodulation, and meet numeral by described
Signal and the outer signals of TV demodulation scramble, and make described to meet the signal of digital television demodulation and outer signals are integrated into one
Signal；
Signal after the integration is demodulated into reduction sequence according to digital television signal mark.
It is preferred that after the judgement has electromagnetic interference on the frequency, in addition to：
The reduction sequence is shown by display device, so that user knows jamming equipment.
It is preferred that the reduction sequence is shown by display device, so that user knows jamming equipment, it is specially：
According to the difference of the n-th frequency, the figure of mosaic or jamming equipment is shown in the different channel of display device
Picture；And/or
According to the difference of the electromagnetic interference, the figure of mosaic or jamming equipment is shown in the different zones of display image
Picture.
It is preferred that when showing mosaic, user instruction is received, the image of the jamming equipment of determination is shown, with
User is set to know that jamming equipment includes：
The display device shows the electronic image and/or word of the jamming equipment.
The embodiment of the present invention provides a kind of device for detecting electromagnetic interference equipment, and the device includes：
Signal processing unit, scrambled, and be demodulated into also for the outer signals after standard sequence is modulated with reception
Former sequence；
It is determined that interference unit, if being more than the standard sequence in the signal intensity of n-th frequency for the reduction sequence
Signal intensity on the frequency, then judge electromagnetic interference be present on the frequency；
Unit is determined, the equipment sequence of each external equipment for obtaining operating conditions, obtains each external equipment in institute
The signal intensity on frequency is stated, determines that the external equipment that signal intensity is maximum on the frequency is jamming equipment.
It is preferred that the determination unit is additionally operable to：
By the jamming equipment the operating conditions of signal intensity and the jamming equipment of the frequency signal intensity ratio
Compared with determining the working condition of the jamming equipment.
It is preferred that the signal processing unit is specifically used for：
By the standard sequence by modulators modulate into the signal for meeting digital television demodulation, and meet numeral by described
Signal and the outer signals of TV demodulation scramble, and make described to meet the signal of digital television demodulation and outer signals are integrated into one
Signal；
Signal after the integration is demodulated into reduction sequence according to digital television signal mark.
It is preferred that described determine that interference unit is additionally operable to：
The reduction sequence is shown by display device, so that user knows jamming equipment.
It is preferred that described determine that interference unit is specifically used for：
According to the difference of the n-th frequency, the figure of mosaic or jamming equipment is shown in the different channel of display device
Picture；And/or
According to the difference of the electromagnetic interference, the figure of mosaic or jamming equipment is shown in the different zones of display image
Picture.
It is preferred that the determination unit is specifically used for：
The display device shows the electronic image and/or word of the jamming equipment.
In the embodiment of the present invention, the outer signals after standard sequence is modulated with reception are scrambled, and are demodulated into reduction
Sequence；If the reduction sequence is strong more than signal of the standard sequence on the frequency in the signal intensity of n-th frequency
Degree, then judge electromagnetic interference be present on the frequency；The equipment sequence of each external equipment of operating conditions is obtained, obtains each outside
Signal intensity of the equipment on the frequency, determine that the external equipment that signal intensity is maximum on the frequency is jamming equipment.Adopt
With this method, electromagnetic interference equipment can be determined according to electromagnetic interference signal.
Brief description of the drawings
Fig. 1 is that the embodiment of the present invention one provides a kind of method flow diagram for detecting electromagnetic interference equipment；
Fig. 2 be it is provided in an embodiment of the present invention standard sequence is modulated after scrambled with the outer signals of reception, and solve
It is adjusted to reduction sequence flow figure；
Fig. 3 is the superposition schematic diagram of electromagnetic signal provided in an embodiment of the present invention；
Fig. 4 is to determine frequency equipment in electromagnetic signal schematic diagram caused by working condition in the embodiment of the present invention；
Fig. 5 is frequency conversion equipment in the embodiment of the present invention in electromagnetic signal schematic diagram caused by working condition；
Fig. 6 is A equipment caused electromagnetic signal curve map at work in the embodiment of the present invention；
Fig. 7 is A, B, C equipment caused electromagnetic signal curve map and A, B, C equipment at work in the embodiment of the present invention
Caused electromagnetic signal superposition plot at work；
Fig. 8 is that the embodiment of the present invention two provides a kind of schematic device for detecting electromagnetic interference equipment.
Embodiment
In the embodiment of the present invention, the outer signals after standard sequence is modulated with reception are scrambled, and are demodulated into reduction
Sequence；If the reduction sequence is strong more than signal of the standard sequence on the frequency in the signal intensity of n-th frequency
Degree, then judge electromagnetic interference be present on the frequency；The equipment sequence of each external equipment of operating conditions is obtained, obtains each outside
Signal intensity of the equipment on the frequency, determine that the external equipment that signal intensity is maximum on the frequency is jamming equipment.Adopt
With this method, electromagnetic interference equipment can be determined according to electromagnetic interference signal.
The executive agent of the embodiment of the present invention is in network side or server, such as digital television.Digital television can
To be the digital television of LCD screen or the digital television of ordinary screen.
Digital television can receive DTMB (Digital Television Terrestrial Multimedia
Broadcasting, digital television ground broadcast transmission system frame structure, Channel Coding and Modulation) signal, wherein, DTMB signals
When by other electromagnetic interference signals to a certain extent, the display performance of DTV will be influenceed, in DTV
Occurs different degrees of mosaic on display screen.
Wherein, electromagnetic interference signal (external electromagnetic waves) is that have a kind of electromagnetic signal of frequency characteristic, normal ground
DTV is also a kind of electromagnetic signal with certain frequency characteristic.When electromagnetic interference signal and the signal of Digital TV Receiving
In same channel, same frequency range, two signals can be overlapped, therefore electromagnetic interference signal can be to Digital TV Receiving
TV signal produce interference.
Electromagnetic interference of the embodiment of the present invention is mainly produced at work by household electrical appliance, electric tool and similar device
Electromagnetic interference, wherein, household electrical appliance mainly include dust catcher, electric fan, washing machine, dryer, refrigerator, air-conditioning, computer,
Electronic game machine, electromagnetic stove, micro-wave oven etc., in particular by the air-conditioning of converter technique, washing machine, refrigerator, micro-wave oven, electromagnetic stove
Deng, its run caused by electromagnetic interference be quite serious.
The outer signals received after the standard sequence adjustment of DTV with antenna are superimposed in the embodiment of the present invention, passed through
The methods of scrambling and conciliation, it is finally a reduction sequence by the signals revivification after superposition, the signal that digital television is shown is i.e.
To reduce sequence, if the electromagnetic interference signal reduced in the outer signals in sequence is stronger, in the display screen of DTV
Corresponding region shows mosaic.The region occurred according to mosaic in the display screen of DTV and Ma Saike quantity,
It is determined that the intensity of the electromagnetic interference signal in outside electromagnetic environment；According to the intensity of electromagnetic interference signal and the electromagnetism ring of outside
The quantity of startup equipment in border, determine that electromagnetic interference signal influences most important equipment, according to the electromagnetic interference signal of equipment
Situation of change in setting time section, determine the working condition of the equipment.
In the embodiment of the present invention, one group of each frequency that the standard sequence of DTV sends for the sequencer of DTV
Point intensity identical signal, after with the scrambling of the outer signals of reception, for judging the radiation intensity of external equipment.Wherein, number
The scope of the standard sequence of word TV is 30MHz~877MHz.And the standard sequence of DTV is set as 50 in the range of
Individual frequency.
The preferred embodiments of the present invention are illustrated below in conjunction with Figure of description, it will be appreciated that described herein
Preferred embodiment is merely to illustrate and explain the present invention, and is not intended to limit the present invention.And in the case where not conflicting, this Shen
Please in embodiment and embodiment in feature can be mutually combined.
Embodiment one
As shown in figure 1, the embodiment of the present invention one provides a kind of method flow diagram for detecting electromagnetic interference equipment, including it is following
Step：
Step 101, the outer signals after standard sequence is modulated with reception are scrambled, and are demodulated into reduction sequence；
Step 102, if the reduction sequence is more than the standard sequence in the frequency in the signal intensity of n-th frequency
On signal intensity, then judge electromagnetic interference be present on the frequency；
Step 103, the equipment sequence of each external equipment of operating conditions is obtained, obtains each external equipment on the frequency
Signal intensity, determine that the external equipment that signal intensity is maximum on the frequency is jamming equipment.
The equipment of detection electromagnetic interference in above-mentioned flow can be digital television.
In a step 101, the outer signals after standard sequence is modulated with reception are scrambled, and are demodulated into reduction sequence
Row, wherein, the signal after scrambling is reconciled can comprise the following steps for reduction sequence, specifically as shown in Figure 2.
In step 1011, antenna receives outer signals, wherein, antenna receive outer signals include TV signal and
Interference signal.
In embodiments of the present invention, TV signal be by emitter by television signal modulation on hyperfrequency carrier wave, then
Space is radiated with electromagnetic wave by antenna, so that television set receives.The frequency range of picture signal in TV signal
In 0Hz~6MHz, according to antenna theory, only when the size of antenna and the close wavelength of signal, antenna could effectively be sent out
Penetrate or receive electromagnetic wave.The frequency of audio frequency and video TV signal is not high enough, and wavelength is oversize, and signal can not be routed directly to antenna with electromagnetism
The form of ripple is launched.Audio frequency and video TV signal is only modulated processing to high frequency carrier, makes audio frequency and video TV signal
It is changed into high-frequency TV signal, to reduce signal wavelength, launches beneficial to antenna and receive.
Further, interference signal is also electromagnetic signal.
The transmission means of electromagnetic signal includes conduction transmission mode and radiation transmission mode.Conduction transmission must be in interference source
There is complete circuit to connect between sensor, interference signal is delivered to sensor along this connection circuit, and it is existing that interference occurs
As.This transmission circuit may include wire, conductive member, power supply, common impedance, ground connection flat board, resistance, the electricity of equipment
Sense, electric capacity and mutual-inductance element etc..Radiation transmission is propagated in the form of an electromagnetic wave by medium, and interfering energy presses the rule of electromagnetic field
Restrain and launch to surrounding space.The outer signals that antenna receives in the embodiment of the present invention are mainly the electromagnetic signal of radiation transmission.Its
In, electromagnetic signal is received by directing antenna, and the electromagnetic signal after reception is entered in scrambling device by antenna.
In step 1012, the locally stored standard sequence of DTV is modulated into the letter for meeting digital television demodulation
Number.
Wherein, the standard sequence stored in DTV the machine possesses certain self checking function, and it meets that DTV enters
Row TS (Transport Stream, transmitting stream) cutting and form output.Wherein, TS streams are entered under high-definition camera shooting
Capable encapsulation format, full name are that MPEG2-TS (Moving Picture Experts Group-Transport Stream, is passed
Defeated stream).It is that subpackage is sent, and each wraps a length of 188 byte.The structure of bag is that packet header is 4 bytes, is loaded as 184
Byte.The data of many types, such as video, audio, self-defined information can be inserted in TS streams.MPEG2-TS is mainly applied
In the TV programme of the program transmitted in real time, such as real-time broadcast.The characteristics of MPEG2-TS forms is exactly to require from video flowing
Any fragment starts all can independently decode.When locally stored standard sequence is after modulator, modulator is by standard
Then the signal for meeting digital television demodulation is input to scrambling device by sequence modulation into the signal for meeting digital television demodulation
In.
In the embodiment of the present invention, step 1011 and step 1012 perform or first carry out step simultaneously
1011, then perform step 1012；Can also first carry out step 1012, perform step 1011；The embodiment of the present invention is to step
Rapid 1011 and the sequencing of step 1012 do not limit.
In step 1013, the electricity that the signal of DTV conciliation and antenna receive is met after the standard sequence is modulated
After magnetic signal is put into scrambling device, after the two Signal averagings, scrambling processing is carried out.
In embodiments of the present invention, the High frequency amplification that the outer signals that antenna receives are sent into tuner by antenna jack
Circuit, exaggerated outer signals are made a gift to someone into scrambler, wherein, locally stored standard sequence is by modulators modulate into meeting
Digital television demodulation signal is also input in scrambler, in scrambler, locally stored signal and the extraneous letter received
Number carry out Signal averaging, obtain new signal.
Wherein, the superposition of electromagnetic signal is consistent with principle of superposition of field intensity, wherein, principle of superposition of field intensity is：Point Charge System is united
The intensity when field strength at middle any point is equal to each electric charge individualism in the vector ripple of field strength caused by the point is energy
Enough it is overlapped mutually, if several electric charges are present simultaneously, electric field caused by them is just overlapped mutually, and is formed and is closed electric field, this
When point field strength when being equal to each electric charge individualism in the vector of field strength caused by the point.As described in Figure 3, if A equipment
It is 30DB in the electromagnetic interference signal intensity of Q frequencies, B device is 40DB in the electromagnetic interference signal intensity of Q frequencies.According to electromagnetism
Ripple superposition theory, the result of the electromagnetic interference strength of superposition should be the values being superimposed in right amount.Such as the if electricity of A equipment and B device
Magnetic disturbance signal is gone together on XY axles, then the Overlay that overall electromagnetic interference strength is A equipment and B device is embodied, if A
On XY axles reversely, then it is that A equipment and B are set to embody overall electromagnetic interference strength to the electromagnetic interference signal of equipment and B device
Standby decrease effect.The embodiment of the present invention is mainly analyzed electromagnetic interference strength enhancing.Wherein, frequency is fixed frequency
Numbering, frequency refer to the tranmitting frequency of wireless signal.
Scrambling in the embodiment of the present invention is that the signal antenna for meeting DTV conciliation after standard sequence is modulated receives
Electromagnetic signal superposition post processing, the two signals is integrated into a demodulation method for meeting receiver or channel solution
The radiofrequency signal of tune ability.
In step 1014, by radiofrequency signal by receiver after, be converted to middle low frequency signal, wherein, by radiofrequency signal
Middle low frequency signal is converted to, being primarily due to middle low frequency signal can avoid second of electromagnetic signal in external interference source from disturbing.
In step 1015, by middle low frequency signal by solving intermediate frequency after, obtain a data flow, data flow now is one
The individual TV signal being disturbed, data flow can be TS streams.
In step 1016, by data flow by obtaining a reduction sequence after decoder.Wherein, reduce and included in sequence
There are TV signal, electromagnetic interference signal and locally stored standard sequence, number is met by the reduction sequence obtained after decoder
The signal identification of word TV.
In a step 102, if the reduction sequence is more than the standard sequence described in the signal intensity of n-th frequency
Signal intensity on frequency, then judge electromagnetic interference be present on the frequency；Wherein, N>0.
Wherein, frequency is the numbering to fixed frequency, and frequency is the tranmitting frequency of main wireless signal.The embodiment of the present invention
In, the electromagnetic signal between antenna configuration 30MHz~877MHz of automatic reception, and by the electricity between 30MHz~877MHz
Magnetic signal is divided into 50 frequencies, wherein, 50 frequencies are corresponding with 50 channels of digital television, such as, the corresponding frequencies of 38MHz
Road 1；55MHz corresponds to channel 2；72MHz corresponds to channel 3 ..., and 869MHz corresponds to channel 50.The embodiment of the present invention is set to frequency
It is fixed and frequency is corresponding with DTV frequency does not limit.
In the embodiment of the present invention, 50 frequencies are both provided with threshold value M, setting threshold value M method mainly includes：Will
Digital television is opened, and other household electrical appliance that same environment is in digital television are closed, and the antenna of DTV relies on
Automatically the function of tuning realizes the Auto-Sensing of electromagnetic signal strength in passband, and the electromagnetic signal that can obtain 50 frequencies is strong
Degree, the electromagnetic signal strength for 50 frequencies that antenna is searched automatically are defined as predetermined threshold value M；Or pass through full frequency band
The mode in automatic search radio station is picked out the electromagnetic signal strength value of 50 channels as preset value automatically.The present invention is implemented
Example is not limited the predetermined threshold value M of 50 frequencies method.
Wherein, the signal that the standard sequence on the frequency is more than when the signal intensity of the reduction sequence on n-th frequency is strong
When spending, it may be determined that electromagnetic interference on the frequency be present, this area staff understands that DTMB signals are done by other electromagnetism
Disturb after limiting scope more than one, mosaic will be shown over the display, so, when the reduction sequence on n-th frequency
When signal intensity is more than the signal intensity of the standard sequence on the frequency, it can only determine electromagnetic interference on the frequency be present, and it is right
Whether electromagnetic interference that should be on frequency can influence the display of DTV, then needs to determine whether that the electromagnetism on the frequency is done
Disturb the threshold value M for whether exceeding frequency setting.
After electromagnetic interference exceedes the threshold value M of frequency setting on n-th frequency, digital electricity will influence DTV
Display picture, can occur mosaic in display image.Due to including TV signal, electromagnetic interference signal in reduction sequence
With locally stored standard sequence, so after sequence and locally stored standard sequence is reduced relatively, remaining signal also wraps
TV signal and electromagnetic interference signal are included, so when electromagnetic interference signal exceedes the threshold value M of setting, electricity will be influenceed
Can be that user is known and number by this method so as to cause that mosaic occurs in the display image of DTV depending on signal
Strong electromagnetic interference be present in other household electrical appliance that word TV is in same environment.
In the embodiment of the present invention, 50 frequencies correspond to 50 channels of DTV respectively, when electromagnetism is done on n-th frequency
After disturbing the threshold value M more than frequency setting, occur in the corresponding picture that can be shown on the n-th channel of digital television
Mosaic.
, can be according to mosaic it is possible to further preset region of the mosaic in DTV display image
Region in display image, determine the intensity of interference signal.
Such as established standardses sequence intensity and external interference sequence intensity ratio be equal to display image in mosaic
The region of appearance, wherein C are the intensity of standard sequence, and N is outer signals intensity, so being occurred according to mosaic in display image
Region and the intensity can of standard sequence calculate outer signals intensity.Wherein, C/N ratios and mosaic appear in display image
In the relation in region can be as follows：
1/128 region mosaic just represents C/N=30DB；
1/64 region mosaic just represents C/N=25DB；
1/32 region mosaic just represents C/N=20DB；
1/16 region mosaic just represents C/N=15DB；
1/8 region mosaic just represents C/N=10DB；
1/4 region mosaic just represents C/N=5DB；
1/2 region mosaic just represents C/N=0DB；
Wherein, C/N is not limited than appearing in the relation in the region in display image with mosaic in the embodiment of the present invention
It is fixed.
Further, the quantity of mosaic is shown according to the setting regions of the display image, it may be determined that interference signal
Intensity.
Wherein, a viewing area is preset in the display image of DTV, can be appointing for DTV screen
Individual place one by one, including the upper left corner, the upper right corner, the lower left corner, lower right corner etc., and viewing area can only account for whole DTV
The 1/M of display screen, wherein, M is at least above 100.The present invention does not limit for M value.
When Digital TV Receiving DTMB signals by other external interference signals to a certain extent, will be in DTV
Show mosaic in the region of setting, wherein, mosaic quantity number, represent the intensity of external interference signal, the present invention is right
The corresponding relation of mosaic quantity and the intensity of external interference signal does not limit in digital television set region.
Step 103, the equipment sequence of each external equipment of operating conditions is obtained, obtains each external equipment on the frequency
Signal intensity, determine that the external equipment that signal intensity is maximum on the frequency is jamming equipment.
DTV in the embodiment of the present invention can be realized by way of manual operation or network control in
Equipment in same environment is opened one by one, and after each opening of device, and the antenna of DTV can be according to automatically configuring
The automatic reception of electromagnetic signal of the method to the equipment of unlatching between 30MHz~877MHz, will be between 30MHz~877MHz
Electromagnetic signal receive after, be stored in the system of DTV.By this method, DTV can be in same environment
Electromagnetic signal of any equipment between 30MHz~877MHz receive automatically, and be stored in the system of DTV.
The each equipment being in DTV in same environment after unlatching, wherein, determine the working condition pair of frequency equipment
Asking for for electric current is changeless, because electromagnetic interference signal caused by the working condition of constant electrical power is also one smooth
Curve either a relatively-stationary curve.It is specific as shown in Figure 4.
And for frequency conversion equipment, when equipment is in energy conservation state, frequency conversion equipment is asked for power supply
It is relatively small, and be invariable, so frequency conversion equipment is also one in electromagnetic interference signal caused by energy conservation state
The smooth curve of a bar either relatively-stationary curve, when equipment, which is in dynamic load, needs adjustment, frequency conversion is set
It is standby that increase is asked for power supply, so frequency conversion equipment caused electromagnetic interference signal when dynamic load adjusts is an increasing
The curve added.It is specific as shown in Figure 5.
Due to the caused electromagnetic interference signal figure being stored with DTV during each equipment work, that is, each set
Standby equipment sequence, so, when the signal intensity of n-th frequency reduction sequence is more than signal of the standard sequence on the frequency
It during intensity, further determined that the electromagnetic interference on the frequency exceedes the threshold value M of frequency setting, included according to reduction sequence
Signal, it may be determined that the equipment of the generation electromagnetic interference on the frequency is the family expenses being in DTV in same environment
Caused by electrical equipment.
Such as shown in fig. 6, with DTV be in same environment open equipment in addition to DTV, only open
The A equipment opened, when A opening of device, the antenna of DTV realizes electromagnetism in passband by the function of tuning automatically
The Auto-Sensing of signal intensity, wherein, automatic tuning capabilities be the left and right 8MHz scopes based on center frequency point passband from
Dynamic detecting, and passband is 30MHz~877MHz, and be 50 frequencies by 30MHz~877MHz points.The complete A of antenna Auto-Sensing
After the electromagnetic signal strength of equipment, 50 frequencies of collection are automatically formed into a logical curve map storage into digital television system,
The data of wherein 50 frequencies are (X1, X2, X3 ... X50).If it is default that the electromagnetic interference of the 5th frequency is more than the frequency
During threshold value M, according to the electromagnetic interference signal figure of 50 frequencies of the A equipment stored in DTV, it is known that A equipment exists
The electromagnetic interference signal intensity of 5th frequency.Simultaneously according to A equipment the 5th frequency electromagnetic interference signal intensity and A equipment
Caused electromagnetic interference signal figure contrast at work, it may be determined that the now working condition of A equipment.
Such as shown in fig. 7, be in DTV in same environment open in addition to DTV, the A that also opens
Equipment, B device and C equipment.According to foregoing description, DTV can obtain A equipment 50 frequencies between 30MHz~877MHz
The electromagnetic interference signal figure of point, the wherein data of the 50 of A equipment frequency are (X1, X2, X3 ... X50)；B device can be obtained
The electromagnetic signal strength curve map of 50 frequencies between 30MHz~877MHz, the data of wherein the 50 of A equipment frequency are
(Y1、Y2、Y3……Y50)；The electromagnetic interference signal figure of C equipment 50 frequencies between 30MHz~877MHz can also be obtained,
Wherein the data of 50 frequencies of A equipment are (Z1, Z2, Z3 ... Z50).When DTV, A equipment, B device and C equipment are same
After Shi Kaiqi, the antenna energy Auto-Sensing A equipment of DTV, B device and C equipment 50 frequencies between 30MHz~877MHz
The electromagnetic interference signal of point, now, the electromagnetic signal strength of antenna Auto-Sensing is three A equipment, B device and C equipment equipment
Electromagnetic interference signal superposition after electromagnetic interference signal, what antenna detected is three A equipment, B device and C equipment equipment
Electromagnetic signal strength superposition of data is (S1, S2, S3 ... S50).
When the electromagnetic interference signal intensity of three equipment superpositions on the 10th frequency is more than default thresholding on the frequency of place
During value M, according to electromagnetic interference figure and A equipment, the B device and C that A equipment, B device and C equipment are stored in digital television system
The electromagnetic interference signal figure of three equipment superpositions of equipment, it is recognised that the electromagnetic interference of which equipment is believed on the 10th frequency
Number maximum intensity, such as, on the 10th frequency the electromagnetic interference signal intensity of A equipment be 40DB, the electromagnetic interference letter of B device
Number intensity is that the electromagnetic interference signal intensity of 35DB, C equipment is 50DB；A equipment, the electricity of three equipment superpositions of B device and C equipment
Magnetic disturbance signal intensity is 52DB, and predetermined threshold value M is 51DB on frequency, then can determine the C equipment on the 10th frequency
Electromagnetic interference signal intensity play most critical for the electromagnetic signal strength of A equipment, the three equipment superposition of B device and C equipment
Effect, so determining that C equipment is the electromagnetic interference equipment on the 10th frequency.
When the electromagnetic interference signal intensity of three equipment superpositions on the 30th frequency is more than default thresholding on the frequency of place
During value M, according to stored in digital television system the electromagnetic interference signal and A equipment of A equipment, B device and C equipment, B device and
The electromagnetic interference signal of three equipment of C equipment superposition, it is recognised that on the 30th frequency which equipment electromagnetic signal strength
Maximum, such as, the electromagnetic interference signal intensity of A equipment is 40DB, the electromagnetic interference signal intensity of B device on the 30th frequency
It is 35DB for the electromagnetic interference signal intensity of 55DB, C equipment；A equipment, the electromagnetic interference of three equipment superpositions of B device and C equipment
Signal intensity is 54DB, and default threshold value M is 51DB on frequency, then can determine the electricity of the B device on the 30th frequency
Magnetic disturbance signal intensity plays the work of most critical for the electromagnetic signal strength of three A equipment, B device and C equipment equipment superpositions
With so determining that B device is the electromagnetic interference equipment on the 30th frequency.
Further, by jamming equipment in electromagnetic interference signal intensity and the work of the jamming equipment of n-th frequency
Caused electromagnetic interference signal figure compares, it may be determined that the working condition of the jamming equipment.
Done according to electromagnetism caused by the work of electromagnetic interference signal intensity of the B device on the 30th frequency and B device
Disturb signal graph, it may be determined that the working condition of B device, wherein, the working condition of B device can include shutdown mode, start mould
Formula and energy saver mode, when the working condition of B device is shutdown mode, then B device is not produce electromagnetic signal strength certainly,
So B device will not be in shutdown mode；When the working condition of B device is under power on mode, in the caused electricity of B device
Magnetic signal should be a logical smooth curve either relatively-stationary curve, still, because B device is in the 30th frequency
Electromagnetic signal strength have fluctuating, therefore, it is determined the working condition of B device is not under power on mode；It is believed that B is set
Standby working condition is in the power save mode.
In embodiments of the present invention, corresponding to the power on mode of equipment it is the working condition for determining frequency equipment, or frequency conversion
Equipment is in working condition during energy-conservation；And it is that frequency conversion equipment is in dynamic load and needs to adjust corresponding to the energy saver mode of equipment
When working condition.
Further, when on n-th frequency electromagnetic interference exceed the frequency setting threshold value M after, it is corresponding can be in number
There is mosaic in the picture shown on the n-th channel of word television set.When DTV is in the time of display mosaic, reception
User instruction, then the image of the jamming equipment of determination can be included in display picture, wherein, DTV is by the interference of determination
When equipment is shown, the picture of the jamming equipment of determination can be shown, the name of the jamming equipment of determination can also be shown
Claim.
Wherein, Digital TV Receiving user instruction can include, and user sends display to DTV by remote control panel and referred to
Order, can also manually digital television setting button.The side that the embodiment of the present invention is used to instruct to Digital TV Receiving
Method does not limit.
Wherein, the title for each equipment being in digital television in same environment and/or each equipment picture can
It is stored in advance in digital television.
The outer signals received after the standard sequence adjustment of DTV with antenna are superimposed in the embodiment of the present invention, passed through
The methods of scrambling and conciliation, it is finally a reduction sequence by the signals revivification after superposition, the signal that digital television is shown is i.e.
To reduce sequence, if the electromagnetic interference signal reduced in the outer signals in sequence is stronger, in the display screen of DTV
Corresponding region shows mosaic.The region occurred according to mosaic in the display screen of DTV and Ma Saike quantity,
It is determined that the intensity of the electromagnetic interference signal in outside electromagnetic environment；According to the intensity of electromagnetic interference signal and the electromagnetism ring of outside
The quantity of startup equipment in border, determine that electromagnetic interference signal influences most important equipment, according to the electromagnetic interference signal of equipment
Situation of change in setting time section, determine the working condition of the equipment.
For above method flow, the embodiment of the present invention also provides a kind of device for detecting electromagnetic interference equipment, these dresses
The particular content put is referred to above method implementation, will not be repeated here.
Embodiment two
The embodiment of the present invention two provides a kind of device for detecting electromagnetic interference equipment, as shown in figure 8, the device includes：Letter
Number processing unit 21, it is determined that interference single 22 and determining unit 23.
Signal processing unit 21, scrambled, and be demodulated into for the outer signals after standard sequence is modulated with reception
Reduce sequence；
It is determined that interference unit 22, if being more than the standard sequence in the signal intensity of n-th frequency for the reduction sequence
The signal intensity being listed on the frequency, then judge electromagnetic interference be present on the frequency；
Unit 23 is determined, the equipment sequence of each external equipment for obtaining operating conditions, each external equipment is obtained and exists
Signal intensity on the frequency, determine that the external equipment that signal intensity is maximum on the frequency is jamming equipment.
Further, the determination unit 23 is additionally operable to：
By the jamming equipment the operating conditions of signal intensity and the jamming equipment of the frequency signal intensity ratio
Compared with determining the working condition of the jamming equipment.
Further, the signal processing unit 21 is specifically used for：
By the standard sequence by modulators modulate into the signal for meeting digital television demodulation, and meet numeral by described
Signal and the outer signals of TV demodulation scramble, and make described to meet the signal of digital television demodulation and outer signals are integrated into one
Signal；
Signal after the integration is demodulated into reduction sequence according to digital television signal mark.
Further, it is described to determine that interference unit 22 is additionally operable to：
The reduction sequence is shown by display device, so that user knows jamming equipment.
Further, it is described to determine that interference unit 22 is specifically used for：
According to the difference of the n-th frequency, the figure of mosaic or jamming equipment is shown in the different channel of display device
Picture；And/or
According to the difference of the electromagnetic interference, the figure of mosaic or jamming equipment is shown in the different zones of display image
Picture.
Further, the determination unit 23 is specifically used for：
The display device shows the electronic image and/or word of the jamming equipment.
It should be appreciated that the unit that includes of device of one of the above detection electromagnetic interference equipment only according to the device realize
The logical partitioning that function is carried out, in practical application, the superposition or fractionation of said units can be carried out.And what the embodiment provided
A kind of detection electromagnetic interference equipment that the function that a kind of device for detecting electromagnetic interference equipment is realized provides with above-described embodiment
Method correspond, the more detailed handling process realized for the device, done in above method embodiment one
It is described in detail, is not described in detail herein.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
- A kind of 1. method for detecting electromagnetic interference equipment, it is characterised in that this method includes：Outer signals after standard sequence is modulated with reception are scrambled, and are demodulated into reduction sequence；If the reduction sequence is strong more than signal of the standard sequence on the frequency in the signal intensity of n-th frequency Degree, then judge electromagnetic interference be present on the frequency；The equipment sequence of each external equipment of operating conditions is obtained, obtains signal intensity of each external equipment on the frequency, really The maximum external equipment of signal intensity is jamming equipment on the fixed frequency；By the jamming equipment the frequency signal intensity compared with the signal intensity of the operating conditions of the jamming equipment, really The working condition of the fixed jamming equipment.
- 2. method as claimed in claim 1, it is characterised in that it is described standard sequence is modulated after carried out with the outer signals of reception Being superimposed and being demodulated into reduction sequence includes：By the standard sequence by modulators modulate into the signal for meeting digital television demodulation, and meet DTV by described The signal of demodulation scrambles with outer signals, makes described to meet the signal of digital television demodulation and outer signals are integrated into a letter Number；Signal after the integration is demodulated into reduction sequence according to digital television signal mark.
- 3. method as claimed in claim 1, it is characterised in that after the judgement has electromagnetic interference on the frequency, also Including：The reduction sequence is shown by display device, so that user knows jamming equipment.
- 4. method as claimed in claim 3, it is characterised in that show the reduction sequence by display device, so that user Know jamming equipment, be specially：According to the difference of the n-th frequency, the image of mosaic or jamming equipment is shown in the different channel of display device； And/orAccording to the difference of the electromagnetic interference, the image of mosaic or jamming equipment is shown in the different zones of display image.
- 5. such as the methods described of claim 3 or 4, it is characterised in that when showing mosaic, user instruction is received, by determination The image of jamming equipment is shown, so that user knows that jamming equipment includes：The display device shows the electronic image and/or word of the jamming equipment.
- 6. a kind of device for detecting electromagnetic interference equipment, it is characterised in that the device includes：Signal processing unit, scrambled for the outer signals after standard sequence is modulated with reception, and be demodulated into reduction sequence Row；It is determined that interference unit, if being more than the standard sequence in institute in the signal intensity of n-th frequency for the reduction sequence The signal intensity on frequency is stated, then judges electromagnetic interference be present on the frequency；Unit is determined, the equipment sequence of each external equipment for obtaining operating conditions, obtains each external equipment in the frequency Signal intensity on point, determine that the external equipment that signal intensity is maximum on the frequency is jamming equipment；The determination unit is additionally operable to：By the jamming equipment the frequency signal intensity compared with the signal intensity of the operating conditions of the jamming equipment, really The working condition of the fixed jamming equipment.
- 7. device as claimed in claim 6, it is characterised in that the signal processing unit is specifically used for：By the standard sequence by modulators modulate into the signal for meeting digital television demodulation, and meet DTV by described The signal of demodulation scrambles with outer signals, makes described to meet the signal of digital television demodulation and outer signals are integrated into a letter Number；Signal after the integration is demodulated into reduction sequence according to digital television signal mark.
- 8. device as claimed in claim 6, it is characterised in that described to determine that interference unit is additionally operable to：The reduction sequence is shown by display device, so that user knows jamming equipment.
- 9. device as claimed in claim 8, it is characterised in that described to determine that interference unit is specifically used for：According to the difference of the n-th frequency, the image of mosaic or jamming equipment is shown in the different channel of display device； And/orAccording to the difference of the electromagnetic interference, the image of mosaic or jamming equipment is shown in the different zones of display image.
- 10. such as the described device of claim 8 or 9, it is characterised in that the determination unit is specifically used for：The display device shows the electronic image and/or word of the jamming equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510034098.7A CN104614606B (en) | 2015-01-23 | 2015-01-23 | A kind of method and device for detecting electromagnetic interference equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510034098.7A CN104614606B (en) | 2015-01-23 | 2015-01-23 | A kind of method and device for detecting electromagnetic interference equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104614606A CN104614606A (en) | 2015-05-13 |
| CN104614606B true CN104614606B (en) | 2018-03-23 |
Family
ID=53149142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510034098.7A Active CN104614606B (en) | 2015-01-23 | 2015-01-23 | A kind of method and device for detecting electromagnetic interference equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104614606B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2132364Y (en) * | 1992-08-19 | 1993-05-05 | 谢国光 | TV image scrambling/descrambling equipment |
| US6985530B1 (en) * | 2002-08-20 | 2006-01-10 | The Directv Group, Inc. | Integrated receiver decoder and method for simultaneously transmitting compressed and uncompressed signals |
| CN101098396A (en) * | 2006-06-29 | 2008-01-02 | 上海高清数字科技产业有限公司 | Method and apparatus for eliminating signal interference |
| CN201207696Y (en) * | 2008-04-23 | 2009-03-11 | 比亚迪股份有限公司 | Vehicle-mounted television |
| CN201234318Y (en) * | 2008-07-07 | 2009-05-06 | 比亚迪股份有限公司 | Television receiving system and vehicle-mounted television device |
| CN102238583A (en) * | 2010-04-28 | 2011-11-09 | 中兴通讯股份有限公司 | Interference source determination method and system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6441876A (en) * | 1987-08-07 | 1989-02-14 | Nippon Telegraph & Telephone | Electromagnetic interference sensitivity measuring apparatus |
| CN2657315Y (en) * | 2003-03-25 | 2004-11-17 | 四川汇源科技发展股份有限公司 | Full digital TV broad easting plus disturbance eliminating circuit |
| CN101231319B (en) * | 2008-02-21 | 2010-06-23 | 中兴通讯股份有限公司 | Electromagnetic interference scanning device and method |
| CN101686088A (en) * | 2008-09-24 | 2010-03-31 | 珠海扬智电子有限公司 | Electromagnetic interference evaluation method |
| CN101871970A (en) * | 2010-06-02 | 2010-10-27 | 中兴通讯股份有限公司 | Wireless terminal and signal scanning method thereof |
| US8498217B2 (en) * | 2010-07-01 | 2013-07-30 | Broadcom Corporation | Method and system for adaptive tone cancellation for mitigating the effects of electromagnetic interference |
| CN103376373A (en) * | 2012-04-26 | 2013-10-30 | 鸿富锦精密工业（深圳）有限公司 | Electromagnetic wave interference detecting system |
-
2015
- 2015-01-23 CN CN201510034098.7A patent/CN104614606B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2132364Y (en) * | 1992-08-19 | 1993-05-05 | 谢国光 | TV image scrambling/descrambling equipment |
| US6985530B1 (en) * | 2002-08-20 | 2006-01-10 | The Directv Group, Inc. | Integrated receiver decoder and method for simultaneously transmitting compressed and uncompressed signals |
| CN101098396A (en) * | 2006-06-29 | 2008-01-02 | 上海高清数字科技产业有限公司 | Method and apparatus for eliminating signal interference |
| CN201207696Y (en) * | 2008-04-23 | 2009-03-11 | 比亚迪股份有限公司 | Vehicle-mounted television |
| CN201234318Y (en) * | 2008-07-07 | 2009-05-06 | 比亚迪股份有限公司 | Television receiving system and vehicle-mounted television device |
| CN102238583A (en) * | 2010-04-28 | 2011-11-09 | 中兴通讯股份有限公司 | Interference source determination method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104614606A (en) | 2015-05-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6996837B1 (en) | Terminal equipment for cable television | |
| US8654262B2 (en) | Content delivery to a digital TV using a low-power frequency converted RF signal | |
| US6915529B1 (en) | Milliwave transmitting device, milliwave receiving device and milliwave transmission and reception system capable of simplifying wiring of a receiving system of terrestrial broadcasting service and satellite broadcasting service | |
| US5880721A (en) | Radio computer audio-video transmission device | |
| US6061096A (en) | Digital-and-analog-TV-signal receivers, each with single first detector and shared high-band I-F amplification | |
| US6377314B1 (en) | Methods and apparatus for transmitting analog and digital information signals | |
| CN101155159A (en) | Detecting circuit, modulation scheme identifying circuit, integrated circuit, tuning device, and common multi-scheme receiving device | |
| CN1375989A (en) | Method and apparatus using a integrated receiver/decoder for watching two independent channel | |
| US3333198A (en) | Television converter for catv system | |
| US7672653B2 (en) | Removing interfering signals in a broadband radio frequency receiver | |
| CN103813203A (en) | Household television multi-screen display system | |
| CN102983834A (en) | Filter amplifier | |
| CN102802076A (en) | Video/audio transmitting method and digital television | |
| CN102088632A (en) | Condition receiving apparatus capable of supporting two program sources and implementation method thereof | |
| CN103281495B (en) | The digital television receiver of compatible with DVB, ATSC standard | |
| US20180269920A1 (en) | Antenna switching arrangement and corresponding device | |
| WO2011062570A1 (en) | Reuse of a switch ic as a step attenuator | |
| CN104614606B (en) | A kind of method and device for detecting electromagnetic interference equipment | |
| US20060038924A1 (en) | Tuner employed to receive digital broadcast | |
| US7489899B2 (en) | Information network building method and network connection circuit for communication between terminals of a physical premises | |
| CN103313001A (en) | Digital television and analog television all-in-one receiver | |
| JP2563401B2 (en) | Receiver | |
| CN201042055Y (en) | Radio differential rotation system for satellite TV middle frequency signal | |
| CN101494758B (en) | Single frequency net front end center transmitting station for multi-channel of digital television ground broadcast | |
| KR101090066B1 (en) | Broadcast signal receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee after: Hisense Visual Technology Co., Ltd. Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: QINGDAO HISENSE ELECTRONICS Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |