CN109274437A - A kind of camera anti-interference method, equipment and computer readable storage medium - Google Patents
A kind of camera anti-interference method, equipment and computer readable storage medium Download PDFInfo
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- CN109274437A CN109274437A CN201811443990.0A CN201811443990A CN109274437A CN 109274437 A CN109274437 A CN 109274437A CN 201811443990 A CN201811443990 A CN 201811443990A CN 109274437 A CN109274437 A CN 109274437A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
- G06F1/08—Clock generators with changeable or programmable clock frequency
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Abstract
The invention discloses a kind of camera anti-interference method, equipment and computer readable storage mediums, belong to communication technique field.The described method includes: obtaining the harmonic power value of the master clock MCLK time-domain signal of the camera of mobile terminal；Obtain the camera of the mobile terminal and the associative simulation data of antenna；The interference value of the corresponding MCLK times of frequency point of designated frequency band is calculated according to the harmonic power value and the associative simulation data, wherein the designated frequency band is the working frequency range that the mobile terminal is supported；If the interference value reaches preset value, communication channel corresponding with the MCLK times of frequency point in designated frequency band write-in frequency range is evaded into list；The frequency range is evaded into list and imports the mobile terminal, communication channel is adjusted so that mobile terminal evades list according to the frequency range, radio frequency interference caused by avoiding the MCLK frequency because of communication channel and camera from clashing.Implementation of the present invention is simple, not only saves system resource, and efficiency is higher.
Description
Technical field
The present invention relates to communication technique field more particularly to a kind of camera anti-interference methods, equipment and computer-readable
Storage medium.
Background technique
Smart phone supports the multiple networks standards such as 2G/3G/4G/WIFI/GPS, and increasing with function at present, internal
The quantity of component is also increasing, and in narrow space, device is more crowded, so being more easier to cause EMI (Electro
Magnetic Interference, electromagnetic interference) problem, influence the receiving sensitivity of antenna.Especially apart from antenna headroom area
The key signal path of neighbouring Primary Component needs its cabling of strict control and layout, reduces radiation interference.
Camera is the formant in smart phone, and when starting camera function, camera bring interference signal is often
It is because camera main system clock (Master Clock, MCLK) frequency hits antenna in the frequency dividing of camera internal or frequency multiplication etc.
Reception channel (i.e. operating handset frequency band), radio frequency interference problem can be caused, bring interference signal, so that antenna receiving sensitivity
It is deteriorated, influences user's video call quality.
In the prior art, the processing mode of a kind of pair of camera interference antenna is that mobile terminal debugs MCLK frequency, then tests
Whether impacted Wi-Fi frequency range improves before card, then verifies whether to bring interference to remaining Wi-Fi channel and GPS, that is, changes
Camera clock frequency verifies all Wi-Fi channels and GPS, brings new interference signal until not generating additional effect, i.e.,
Using this clock frequency.But whether clock frequency of every change just needs to verify all Wi-Fi frequency ranges and GPS by shadow
It rings, efficiency is lower.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of camera anti-interference method, equipment and computer-readable depositing
Storage media, to solve the problems, such as processing mode complexity, the low efficiency of prior art camera interference antenna.
It is as follows that the present invention solves technical solution used by above-mentioned technical problem:
According to the first aspect of the invention, a kind of camera anti-interference method is provided, is suitable for anti-interference data and analyzes
Equipment the described method comprises the following steps:
Obtain the harmonic power value of the master clock MCLK time-domain signal of the camera of mobile terminal；
Obtain the camera of the mobile terminal and the associative simulation data of antenna；
The dry of the corresponding MCLK times of frequency point of designated frequency band is calculated according to the harmonic power value and the associative simulation data
Value is disturbed, wherein the designated frequency band is the working frequency range that the mobile terminal is supported；
If the interference value reaches preset value, by communication channel corresponding with the MCLK times of frequency point in the designated frequency band
Write-in frequency range evades list；
The frequency range is evaded into list and imports the mobile terminal, so that mobile terminal evades list pair according to the frequency range
Communication channel is adjusted, radio frequency interference caused by avoiding the MCLK frequency because of communication channel and camera from clashing.
According to the second aspect of the invention, a kind of camera anti-interference method is provided, mobile terminal, the side are suitable for
Method the following steps are included:
When detecting camera starting, the current communication channel of mobile terminal is obtained；
It inquires the frequency range prestored and evades list, judge that the frequency range evades whether list contains the communication channel；
If so, the communication channel of the mobile terminal is switched to be not included in the frequency range evade other in list lead to
Believe channel；
Wherein, it is the MCLK with the camera of the mobile terminal that the frequency range, which evades the communication channel for including in list,
The channel of frequency point conflict.
According to the third aspect of the present invention, a kind of anti-interference data analysis equipment, anti-interference data analysis equipment are provided
Including memory, processor and it is stored in the computer program that can be run on the memory and on the processor, institute
It states when computer program is executed by the processor and realizes following steps:
Obtain the harmonic power value of the master clock MCLK time-domain signal of the camera of mobile terminal；
Obtain the camera of the mobile terminal and the associative simulation data of antenna；
The dry of the corresponding MCLK times of frequency point of designated frequency band is calculated according to the harmonic power value and the associative simulation data
Value is disturbed, wherein the designated frequency band is the working frequency range that the mobile terminal is supported；
If the interference value reaches preset value, designated frequency band write-in frequency range is evaded into list；
The frequency range is evaded into list and imports the mobile terminal, so that mobile terminal evades list pair according to the frequency range
Working frequency range is adjusted, radio frequency interference caused by avoiding the MCLK frequency because of working frequency range and camera from clashing.
According to the fourth aspect of the present invention, a kind of mobile terminal is provided, the mobile terminal includes: memory, processing
Device and it is stored in the computer program that can be run on the memory and on the processor, the computer program is by institute
It states when processor executes and realizes following steps:
When detecting camera starting, the current communication channel of mobile terminal is obtained；
It inquires the frequency range prestored and evades list, judge that the frequency range evades whether list contains the communication channel；
If so, the communication channel of the mobile terminal is switched to be not included in the frequency range evade other in list lead to
Believe channel,
Wherein, it is the MCLK with the camera of the mobile terminal that the frequency range, which evades the communication channel for including in list,
The channel of frequency point conflict.
According to the fifth aspect of the present invention, computer readable storage medium, the computer readable storage medium are provided
On be stored with computer program, the computer program realizes foregoing camera anti-interference method when being executed by processor
The step of.
Camera anti-interference method, equipment and the computer readable storage medium of the embodiment of the present invention, before product design
Phase carries out interference analysis, obtains evading list for the frequency range of camera MCLK frequency point, then should when mobile terminal produces
Frequency range evades list importing, makes mobile terminal when using camera, it is only necessary to judge that the current communication channel of mobile terminal is
No and to adjust when needing to evade to other communication channels to need the channel evaded, implementation is simple, not only saves and is
System resource, and efficiency is higher.
Detailed description of the invention
A kind of hardware structural diagram of Fig. 1 mobile terminal of each embodiment to realize the present invention；
Fig. 2 is a kind of communications network system architecture diagram that present invention implementation provides；
Fig. 3 is the anti-interference side of a kind of camera suitable for anti-interference data analysis equipment that the embodiment of the present invention one provides
The flow chart of method；
Fig. 4 is the actual measurement MCLK signal waveform diagram of camera in the embodiment of the present invention one；
Fig. 5 is the spectrum signal figure of MCLK time-domain signal shown in Fig. 4；
Fig. 6 is camera and antenna associative simulation figure；
Isolation simulation result diagram of the Fig. 7 between antenna and camera；
Fig. 8 is another camera anti-interference method provided by Embodiment 2 of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
In subsequent description, it is only using the suffix for indicating such as " module ", " component " or " unit " of element
Be conducive to explanation of the invention, itself there is no a specific meaning.Therefore, " module ", " component " or " unit " can mix
Ground uses.
Terminal can be implemented in a variety of manners.For example, terminal described in the present invention may include such as mobile phone, plate
Computer, laptop, palm PC, personal digital assistant (Personal Digital Assistant, PDA), portable
Media player (Portable Media Player, PMP), navigation device, wearable device, Intelligent bracelet, pedometer etc. move
The fixed terminals such as dynamic terminal, and number TV, desktop computer.
It will be illustrated by taking mobile terminal as an example in subsequent descriptions, it will be appreciated by those skilled in the art that in addition to special
Except element for moving purpose, the construction of embodiment according to the present invention can also apply to the terminal of fixed type.
Referring to Fig. 1, a kind of hardware structural diagram of its mobile terminal of each embodiment to realize the present invention, the shifting
Dynamic terminal 100 may include: RF (Radio Frequency, radio frequency) unit 101, WiFi module 102, audio output unit
103, A/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit
108, the components such as memory 109, processor 110 and power supply 111.It will be understood by those skilled in the art that shown in Fig. 1
Mobile terminal structure does not constitute the restriction to mobile terminal, and mobile terminal may include components more more or fewer than diagram,
Perhaps certain components or different component layouts are combined.
It is specifically introduced below with reference to all parts of the Fig. 1 to mobile terminal:
Radio frequency unit 101 can be used for receiving and sending messages or communication process in, signal sends and receivees, specifically, by base station
Downlink information receive after, to processor 110 handle；In addition, the data of uplink are sent to base station.In general, radio frequency unit 101
Including but not limited to antenna, at least one amplifier, transceiver, coupler, low-noise amplifier, duplexer etc..In addition, penetrating
Frequency unit 101 can also be communicated with network and other equipment by wireless communication.Any communication can be used in above-mentioned wireless communication
Standard or agreement, including but not limited to GSM (Global System of Mobile communication, global system for mobile telecommunications
System), GPRS (General Packet Radio Service, general packet radio service), CDMA2000 (Code
Division Multiple Access 2000, CDMA 2000), WCDMA (Wideband Code Division
Multiple Access, wideband code division multiple access), TD-SCDMA (Time Division-Synchronous Code
Division Multiple Access, TD SDMA), FDD-LTE (Frequency Division
Duplexing-Long Term Evolution, frequency division duplex long term evolution) and TDD-LTE (Time Division
Duplexing-Long Term Evolution, time division duplex long term evolution) etc..
WiFi belongs to short range wireless transmission technology, and mobile terminal can help user to receive and dispatch electricity by WiFi module 102
Sub- mail, browsing webpage and access streaming video etc., it provides wireless broadband internet access for user.Although Fig. 1 shows
Go out WiFi module 102, but it is understood that, and it is not belonging to must be configured into for mobile terminal, it completely can be according to need
It to omit within the scope of not changing the essence of the invention.
Audio output unit 103 can be in call signal reception pattern, call mode, record mould in mobile terminal 100
When under the isotypes such as formula, speech recognition mode, broadcast reception mode, by radio frequency unit 101 or WiFi module 102 it is received or
The audio data stored in memory 109 is converted into audio signal and exports to be sound.Moreover, audio output unit 103
Audio output relevant to the specific function that mobile terminal 100 executes can also be provided (for example, call signal receives sound, disappears
Breath receives sound etc.).Audio output unit 103 may include loudspeaker, buzzer etc..
A/V input unit 104 is for receiving audio or video signal.A/V input unit 104 may include graphics processor
(Graphics Processing Unit, GPU) 1041 and microphone 1042, graphics processor 1041 is in video acquisition mode
Or the image data of the static images or video obtained in image capture mode by image capture apparatus (such as camera) carries out
Reason.Treated, and picture frame may be displayed on display unit 106.Through graphics processor 1041, treated that picture frame can be deposited
Storage is sent in memory 109 (or other storage mediums) or via radio frequency unit 101 or WiFi module 102.Mike
Wind 1042 can connect in telephone calling model, logging mode, speech recognition mode etc. operational mode via microphone 1042
Quiet down sound (audio data), and can be audio data by such acoustic processing.Audio that treated (voice) data can
To be converted to the format output that can be sent to mobile communication base station via radio frequency unit 101 in the case where telephone calling model.
Microphone 1042 can be implemented various types of noises elimination (or inhibition) algorithms and send and receive sound to eliminate (or inhibition)
The noise generated during frequency signal or interference.
Mobile terminal 100 further includes at least one sensor 105, such as optical sensor, motion sensor and other biographies
Sensor.Specifically, optical sensor includes ambient light sensor and proximity sensor, wherein ambient light sensor can be according to environment
The light and shade of light adjusts the brightness of display panel 1061, and proximity sensor can close when mobile terminal 100 is moved in one's ear
Display panel 1061 and/or backlight.As a kind of motion sensor, accelerometer sensor can detect in all directions (general
For three axis) size of acceleration, it can detect that size and the direction of gravity when static, can be used to identify the application of mobile phone posture
(such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, percussion) etc.；
The fingerprint sensor that can also configure as mobile phone, pressure sensor, iris sensor, molecule sensor, gyroscope, barometer,
The other sensors such as hygrometer, thermometer, infrared sensor, details are not described herein.
Display unit 106 is for showing information input by user or being supplied to the information of user.Display unit 106 can wrap
Display panel 1061 is included, liquid crystal display (Liquid Crystal Display, LCD), Organic Light Emitting Diode can be used
Forms such as (Organic Light-Emitting Diode, OLED) configure display panel 1061.
User input unit 107 can be used for receiving the number or character information of input, and generate the use with mobile terminal
Family setting and the related key signals input of function control.Specifically, user input unit 107 may include touch panel 1071 with
And other input equipments 1072.Touch panel 1071, also referred to as touch screen collect the touch operation of user on it or nearby
(for example user uses any suitable objects or attachment such as finger, stylus on touch panel 1071 or in touch panel 1071
Neighbouring operation), and corresponding attachment device is driven according to preset formula.Touch panel 1071 may include touch detection
Two parts of device and touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect touch operation band
The signal come, transmits a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and by it
It is converted into contact coordinate, then gives processor 110, and order that processor 110 is sent can be received and executed.In addition, can
To realize touch panel 1071 using multiple types such as resistance-type, condenser type, infrared ray and surface acoustic waves.In addition to touch panel
1071, user input unit 107 can also include other input equipments 1072.Specifically, other input equipments 1072 can wrap
It includes but is not limited in physical keyboard, function key (such as volume control button, switch key etc.), trace ball, mouse, operating stick etc.
It is one or more, specifically herein without limitation.
Further, touch panel 1071 can cover display panel 1061, when touch panel 1071 detect on it or
After neighbouring touch operation, processor 110 is sent to determine the type of touch event, is followed by subsequent processing device 110 according to touch thing
The type of part provides corresponding visual output on display panel 1061.Although in Fig. 1, touch panel 1071 and display panel
1061 be the function that outputs and inputs of realizing mobile terminal as two independent components, but in certain embodiments, it can
The function that outputs and inputs of mobile terminal is realized so that touch panel 1071 and display panel 1061 is integrated, is not done herein specifically
It limits.
Interface unit 108 be used as at least one external device (ED) connect with mobile terminal 100 can by interface.For example,
External device (ED) may include wired or wireless headphone port, external power supply (or battery charger) port, wired or nothing
Line data port, memory card port, the port for connecting the device with identification module, audio input/output (I/O) end
Mouth, video i/o port, ear port etc..Interface unit 108 can be used for receiving the input from external device (ED) (for example, number
It is believed that breath, electric power etc.) and the input received is transferred to one or more elements in mobile terminal 100 or can be with
For transmitting data between mobile terminal 100 and external device (ED).
Memory 109 can be used for storing software program and various data.Memory 109 can mainly include storing program area
The storage data area and, wherein storing program area can (such as the sound of application program needed for storage program area, at least one function
Sound playing function, image player function etc.) etc.；Storage data area can store according to mobile phone use created data (such as
Audio data, phone directory etc.) etc..In addition, memory 109 may include high-speed random access memory, it can also include non-easy
The property lost memory, a for example, at least disk memory, flush memory device or other volatile solid-state parts.
Processor 110 is the control centre of mobile terminal, utilizes each of various interfaces and the entire mobile terminal of connection
A part by running or execute the software program and/or module that are stored in memory 109, and calls and is stored in storage
Data in device 109 execute the various functions and processing data of mobile terminal, to carry out integral monitoring to mobile terminal.Place
Managing device 110 may include one or more processing units；Preferably, processor 110 can integrate application processor and modulatedemodulate is mediated
Manage device, wherein the main processing operation system of application processor, user interface and application program etc., modem processor is main
Processing wireless communication.It is understood that above-mentioned modem processor can not also be integrated into processor 110.
Mobile terminal 100 can also include the power supply 111 (such as battery) powered to all parts, it is preferred that power supply 111
Can be logically contiguous by power-supply management system and processor 110, to realize management charging by power-supply management system, put
The functions such as electricity and power managed.
Although Fig. 1 is not shown, mobile terminal 100 can also be including bluetooth module etc., and details are not described herein.
Embodiment to facilitate the understanding of the present invention, the communications network system that mobile terminal of the invention is based below into
Row description.
Referring to Fig. 2, Fig. 2 is a kind of communications network system architecture diagram provided in an embodiment of the present invention, the communication network system
System is the LTE system of universal mobile communications technology, which includes UE (User Equipment, the use of successively communication connection
Family equipment) (the land Evolved UMTS Terrestrial Radio Access Network, evolved UMTS 201, E-UTRAN
Ground wireless access network) 202, EPC (Evolved Packet Core, evolved packet-based core networks) 203 and operator IP operation
204。
Specifically, UE201 can be above-mentioned terminal 100, and details are not described herein again.
E-UTRAN202 includes eNodeB2021 and other eNodeB2022 etc..Wherein, eNodeB2021 can be by returning
Journey (backhaul) (such as X2 interface) is connect with other eNodeB2022, and eNodeB2021 is connected to EPC203,
ENodeB2021 can provide the access of UE201 to EPC203.
EPC203 may include MME (Mobility Management Entity, mobility management entity) 2031, HSS
(Home Subscriber Server, home subscriber server) 2032, other MME2033, SGW (Serving Gate Way,
Gateway) 2034, PGW (PDN Gate Way, grouped data network gateway) 2035 and PCRF (Policy and
Charging Rules Function, policy and rate functional entity) 2036 etc..Wherein, MME2031 be processing UE201 and
The control node of signaling, provides carrying and connection management between EPC203.HSS2032 is all to manage for providing some registers
Such as the function of home location register (not shown) etc, and preserves some related service features, data rates etc. and use
The dedicated information in family.All customer data can be sent by SGW2034, and PGW2035 can provide the IP of UE 201
Address distribution and other functions, PCRF2036 are strategy and the charging control strategic decision-making of business data flow and IP bearing resource
Point, it selects and provides available strategy and charging control decision with charge execution function unit (not shown) for strategy.
IP operation 204 may include internet, Intranet, IMS (IP Multimedia Subsystem, IP multimedia
System) or other IP operations etc..
Although above-mentioned be described by taking LTE system as an example, those skilled in the art should know the present invention is not only
Suitable for LTE system, be readily applicable to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA with
And the following new network system etc., herein without limitation.
Based on above-mentioned mobile terminal hardware configuration and communications network system, each embodiment of the method for the present invention is proposed.
The embodiment of the present invention one provides a kind of camera anti-interference method, is suitable for anti-interference data analysis equipment.Please
Refering to Fig. 3, method flow includes:
Step S301, the harmonic power value of the master clock MCLK time-domain signal of the camera of mobile terminal is obtained；
Step S302, the camera of the mobile terminal and the associative simulation data of antenna are obtained；
Step S303, the corresponding MCLK times of frequency point of designated frequency band is calculated according to the harmonic power value and the associative simulation data
Interference value, wherein the designated frequency band be the mobile terminal support working frequency range；
If step S304, the interference value reaches preset value, by communication corresponding with the MCLK times of frequency point in the designated frequency band
Channel write-in frequency range evades list；
Step S305, the frequency range is evaded into list and imports the mobile terminal so that the mobile terminal camera open when,
Evade list according to the frequency range to be adjusted communication channel, the MCLK frequency because of communication channel and camera is avoided to clash
Caused radio frequency interference.
In practical application, step S301 to step S305 can carry out progress product design early period to mobile terminal.So
Afterwards when the mobile terminal generates, analysis result (frequency range evades list) is imported in mobile terminal, mobile terminal is being imaged
When head is opened, the frequency range being disturbed is avoided.
In a feasible scheme, the master clock MCLK time-domain signal of the camera of mobile terminal step S301, is obtained
Harmonic power value, comprising:
Obtain the MCLK time-domain signal；
Fast Fourier transform is carried out to the MCLK time-domain signal and generates spectrum signal figure；
The harmonic power value of the MCLK time-domain signal is obtained according to the spectrum signal figure.
In a feasible scheme, step S303, calculated according to the harmonic power value and the associative simulation data specified
The interference value of the corresponding MCLK times of frequency point of frequency range, comprising:
Simulation process is carried out to the isolation between the antenna and camera according to the associative simulation data, it is specified to obtain this
The corresponding MCLK times of frequency point of frequency range and isolation；
The difference for calculating the harmonic power value and the isolation obtains MCLK times of frequency point making an uproar in the antenna current feed port
Sound；
The conducted susceptibility of the designated frequency band and the difference of the noise are calculated, the interference value is obtained.
Below by a feasible example, the present embodiment is specifically described.
Camera MCLK signal passes through internal cabling, by attachment base FPC ((Flexible Printed Circuit, it is soft
Property circuit board) flow into camera body, radiation energy majority concentrate on attachment base and after, survey MCLK signal waveform such as Fig. 4
It is shown.
FFT change is made into MCLK time-domain signal importing Ansoft Designer (microwave circuit and Communication System Simulation software)
It changes (Fast Fourier Transformation, fast Fourier transform), generates spectrum signal figure (as shown in Figure 5).
From harmonic power value of the MCLK available in Fig. 5 at following each frequency point, as shown in table 1, to randomly select
Several frequency points harmonic power.Wherein the Power (dbV) of second row is the harmonic power directly obtained from Fig. 5, and unit is
Dbv, the Power (db μ V) of third batch are that the numerical value of second row carries out the harmonic power after Conversion of measurement unit, and unit is db μ V.
Table 1
Camera and antenna associative simulation figure are imported into 3 D electromagnetic simulation software CST (Computer Simulation
Technology, simulation software) in, associative simulation data are extracted from associative simulation figure by CST, and carry out simulation process and obtain
Isolation between antenna and camera.
Please refer to Fig. 6 and Fig. 7.Fig. 6 is camera and antenna associative simulation figure, and camera and day can be extracted from figure
The distance between line X and other be used for analytical calculation isolation data.Isolation of the Fig. 7 between antenna and camera.
As can be seen from Figure 7 when mobile terminal selects GMS850 communications band (869-890MHz), MCLK harmonic wave times
Frequency point is 888MHz, and isolation is -62dB.
Thus MCLK multiplied frequency harmonic 888Mhz is calculated in the noise of antenna current feed port are as follows: the harmonic wave of MCLK times of frequency point
Power-isolation=66.6-62=4.6uV=-95dBm.
It should be noted that mobile terminal (data of the mobile terminal are identical as the associative simulation data of Fig. 6)
In actual test, when the working frequency range GSM850 frequency range of mobile terminal, the noise that MCLK signal couples at antenna feed point is-
94dBm, the result -95dBm obtained with simulation result are almost the same.That is, using noise figure obtained by the above method
It is reliable.
And GSM850 conduction TIS (Total Isotropic Sensitivity receives sensitivity) it is general about-
110dbm, so interference basically reaches a dB more than 10 at the 888MHz frequency point of camera MCLK.In practical application, can normally it connect
The interference received generally is defined on 2-3 db, it is possible thereby to judge at the 888MHz frequency point of camera MCLK, GSM850 frequency range by
Interfere it is larger evaded, will be related to the corresponding channel of 888MHz frequency point (222 channel) of MCLK in GSM850 frequency range
Data deposit frequency range is evaded in list.
In practical application, can preset the acceptable interference upper limit is 2db or 3db, can also be according to actual needs
It carries out being set as other values.
In practical application, frequency range evades the content stored in list in addition to the communication channel that need to evade, and may also include that this is logical
The frequency range that the frequency point of the corresponding MCLK of letter channel, harmonic power, isolation, interference value and communication channel of the frequency point are somebody's turn to do
Deng.
In practical application, by table 1 and Fig. 7, each times of frequency point of available camera MCLK supports mobile terminal
Itself and preset threshold value comparison can be obtained and need to advise in the camera unlatching of mobile terminal by the interference of each communications band
The communications band kept away.
The camera anti-interference method of the present embodiment is the communications band that may interfere with to camera in product design early period
Analytical calculation is carried out, frequency range is obtained and evades list, then in production, this is evaded into list and is imported in mobile terminal, by
Mobile terminal avoids the interference by channel switching when in use.Such as:
Pass through analysis and obtains the frequency that MCLK multiplied frequency harmonic performance number easily causes interference near GSM850 frequency range TIS value
Point is 888MHZ, when camera is closed, when mobile terminal connects GSM850 frequency range, arbitrarily switches channel, is not influenced by camera；
When camera is opened, when inquiry frequency range evades list discovery mobile terminal connection GSM850 band channels, existing need to evade
Communication channel is that 222 channels (888MHz) only needs to be adjusted at this time if mobile terminal has used 222 channels just
Other channels such as 128 channels can avoid camera to the radio frequency interference of antenna.Compared with prior art, before product design
Phase by accurately simulation modeling, can not only predict potential radiation source, and can obtain the interference size of its coupled noise,
Whether decision circuitry is reasonable with PCB design, improves hardware detection De-sense working efficiency, increases product plate-making success rate.
On the basis of previous embodiment, second embodiment of the present invention provides another camera anti-interference methods, are applicable in
In mobile terminal, referring to Fig. 8, method includes the following steps:
Step S801, when detecting camera starting, the current communication channel of mobile terminal is obtained；
Step S802, the frequency range that inquiry prestores evades list, judges that the frequency range evades whether list contains communication letter
Road；
If step S803, the frequency range evades list and contains the communication channel, the communication channel of the mobile terminal is switched
Evade other communication channels in list to the frequency range is not included in；
Wherein, it is the frequency point with the MCLK of the camera of the mobile terminal which, which evades the communication channel for including in list,
The channel of conflict.
In a feasible scheme, this method further include:
It is imported from anti-interference data analysis equipment and stores the frequency range and evade list.
In a feasible scheme, which evades list storage content in addition to the communication channel for needing to evade, and may be used also
Including following information:
The frequency point of the corresponding MCLK of the communication channel, the harmonic power of the frequency point, isolation, interference value and the communication
The frequency range etc. that channel is somebody's turn to do.
In a feasible scheme, the communication channel of the mobile terminal is switched to and is not included in the frequency by step S803
Section evades other communication channels in list, comprising:
Step S8031, judge communications band belonging to current communication channel；
Step S8032, judging, which whether there is in the frequency range, does not evade other communication channels that list includes by the frequency range, if
It is no to then follow the steps S8034 in the presence of execution step S8033；
Step S8033, a communication channel is selected to switch over from other communication channels；
Step S8034, obtain the mobile terminal support other communications bands, selected from other communications bands not by
The frequency range is evaded the communication channel that list includes and is switched over.
Taking the photograph with mobile terminal of needing to evade is stored in advance in mobile terminal in the camera anti-interference method of the present embodiment
As the communication channel of the frequency point conflict of the MCLK of head, when camera is opened, it is only necessary to judge the current communication letter of mobile terminal
Whether road is the channel for needing to evade, and is adjusted when needing to evade to other communication channels, and implementation is simple, not only saves
System resource, and efficiency is higher.
On the basis of previous embodiment, the embodiment of the present invention three provides a kind of anti-interference data analysis equipment, this is anti-
Interference data analysis equipment includes memory, processor and is stored in the meter that can be run on the memory and on the processor
Calculation machine program, the computer program realize following steps when being executed by the processor:
Obtain the harmonic power value of the master clock MCLK time-domain signal of the camera of mobile terminal；
Obtain the camera of the mobile terminal and the associative simulation data of antenna；
The interference value of the corresponding MCLK times of frequency point of designated frequency band is calculated according to the harmonic power value and the associative simulation data,
Wherein the designated frequency band is the working frequency range that the mobile terminal is supported；
If the interference value reaches preset value, designated frequency band write-in frequency range is evaded into list；
The frequency range is evaded into list and imports the mobile terminal, so that mobile terminal evades list to work frequency according to the frequency range
Section is adjusted, radio frequency interference caused by avoiding the MCLK frequency because of working frequency range and camera from clashing.
In a feasible scheme, when the master clock MCLK time-domain signal for the camera for executing the acquisition mobile terminal
When the step of harmonic power value, which is also used to execute the computer program, to perform the steps of
Obtain the MCLK time-domain signal；
Fast Fourier transform is carried out to the MCLK time-domain signal and generates spectrum signal figure；
The harmonic power value of the MCLK time-domain signal is obtained according to the spectrum signal figure.
In a feasible scheme, specified frequency is calculated according to the harmonic power value and the associative simulation data executing this
When the step of the interference value of the corresponding MCLK times of frequency point of section, which is also used to execute the computer program, following to realize
Step:
Simulation process is carried out to the isolation between the antenna and camera according to the associative simulation data, it is specified to obtain this
The corresponding MCLK times of frequency point of frequency range and isolation；
The difference for calculating the harmonic power value and the isolation obtains MCLK times of frequency point making an uproar in the antenna current feed port
Sound；
The conducted susceptibility of the designated frequency band and the difference of the noise are calculated, the interference value is obtained.
In practical application, mobile terminal divide the interference of antenna in video camera product design early period
Analysis obtains frequency range and evades list, then when the mobile terminal generates, analysis result (frequency range evades list) importing is mobile eventually
In end, makes mobile terminal when camera is opened, avoid the frequency range being disturbed.
Compared with prior art, interference analysis is carried out early period in product design, can not only predict potential radiation source, and
The interference size of its coupled noise can be obtained, whether decision circuitry is reasonable with PCB design, improves hardware detection De-sense work
Make efficiency, increases product plate-making success rate.
On the basis of previous embodiment, the embodiment of the present invention four provides a mobile terminal, which includes: to deposit
Reservoir, processor and it is stored in the computer program that can be run on the memory and on the processor, the computer program
Following steps are realized when being executed by the processor:
When detecting camera starting, the current communication channel of mobile terminal is obtained；
It inquires the frequency range prestored and evades list, judge that the frequency range evades whether list contains the communication channel；
Believe if so, the communication channel of the mobile terminal is switched to and is not included in other communications that the frequency range is evaded in list
Road,
Wherein, it is the frequency point with the MCLK of the camera of the mobile terminal which, which evades the communication channel for including in list,
The channel of conflict.
In a feasible scheme, which is also used to execute following steps: from anti-interference data analysis equipment
It imports and the frequency range is evaded into list storage into the memory.
In a feasible scheme, when execution, this, which switches to the communication channel of the mobile terminal, is not included in the frequency range
When evading the step of other communication channels in list, which is also used to execute the computer program, to realize following step
It is rapid:
Judge communications band belonging to current communication channel；
Judging, which whether there is in the frequency range, does not evade other communication channels that list includes by the frequency range；
If so, selecting a communication channel to switch over from other communication channels；
Otherwise, other communications bands for obtaining mobile terminal support, select from other communications bands not by the frequency
Section is evaded the communication channel that list includes and is switched over.
Taking the photograph with mobile terminal of needing to evade is stored in advance in mobile terminal in the camera anti-interference method of the present embodiment
As the communication channel of the frequency point conflict of the MCLK of head, when camera is opened, it is only necessary to judge the current communication letter of mobile terminal
Whether road is the channel for needing to evade, and is adjusted when needing to evade to other communication channels, and implementation is simple, not only saves
System resource, and efficiency is higher.
On the basis of previous embodiment, the embodiment of the present invention five provides a kind of computer readable storage medium, the calculating
It is stored with computer program on machine readable storage medium storing program for executing, such as first embodiment is realized when which is executed by processor
And/or described in second embodiment the step of camera anti-interference method.
The computer program stored in the computer readable storage medium of the present embodiment can be carried out in product design early period
Interference analysis obtains evading list for the frequency range of camera MCLK frequency point, then advises the frequency range when mobile terminal produces
List importing is kept away, makes mobile terminal when using camera, it is only necessary to judge whether the current communication channel of mobile terminal is to need
The channel to be evaded, and adjust when needing to evade to other communication channels, implementation is simple, not only saves system money
Source, and efficiency is higher.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal (can be mobile phone, computer, service
Device, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (10)
1. a kind of camera anti-interference method is suitable for anti-interference data analysis equipment, the described method comprises the following steps:
Obtain the harmonic power value of the master clock MCLK time-domain signal of the camera of mobile terminal；
Obtain the camera of the mobile terminal and the associative simulation data of antenna；
The interference value of the corresponding MCLK times of frequency point of designated frequency band is calculated according to the harmonic power value and the associative simulation data,
Wherein the designated frequency band is the working frequency range that the mobile terminal is supported；
If the interference value reaches preset value, communication channel corresponding with the MCLK times of frequency point in the designated frequency band is written
Frequency range evades list；
The frequency range is evaded into list and imports the mobile terminal, so that mobile terminal evades list to communication according to the frequency range
Channel is adjusted, radio frequency interference caused by avoiding the MCLK frequency because of communication channel and camera from clashing.
2. camera anti-interference method as described in claim 1, which is characterized in that the camera for obtaining mobile terminal
The harmonic power value of master clock MCLK time-domain signal, comprising:
Obtain the MCLK time-domain signal；
Fast Fourier transform is carried out to the MCLK time-domain signal and generates spectrum signal figure；
The harmonic power value of the MCLK time-domain signal is obtained according to the spectrum signal figure.
3. camera anti-interference method as described in claim 1, which is characterized in that described according to the harmonic power value and institute
State the interference value that associative simulation data calculate the corresponding MCLK times of frequency point of designated frequency band, comprising:
Simulation process is carried out to the isolation between the antenna and camera according to the associative simulation data, obtains the finger
Determine the corresponding MCLK times of frequency point of frequency range and isolation；
The difference for calculating the harmonic power value and the isolation obtains the MCLK times of frequency point in the antenna current feed port
Noise；
The conducted susceptibility of the designated frequency band and the difference of the noise are calculated, the interference value is obtained.
4. a kind of camera anti-interference method is suitable for mobile terminal, the described method comprises the following steps:
When detecting camera starting, the current communication channel of mobile terminal is obtained；
It inquires the frequency range prestored and evades list, judge that the frequency range evades whether list contains the communication channel；
Believe if so, the communication channel of the mobile terminal is switched to and is not included in other communications that the frequency range is evaded in list
Road；
Wherein, it is the frequency point with the MCLK of the camera of the mobile terminal that the frequency range, which evades the communication channel for including in list,
The channel of conflict.
5. camera anti-interference method as claimed in claim 4, which is characterized in that the method also includes:
It is imported from anti-interference data analysis equipment and stores the frequency range and evade list.
6. a kind of anti-interference data analysis equipment, which is characterized in that anti-interference data analysis equipment include memory, processor with
And it is stored in the computer program that can be run on the memory and on the processor, the computer program is by the place
Reason device realizes following steps when executing:
Obtain the harmonic power value of the master clock MCLK time-domain signal of the camera of mobile terminal；
Obtain the camera of the mobile terminal and the associative simulation data of antenna；
The interference value of the corresponding MCLK times of frequency point of designated frequency band is calculated according to the harmonic power value and the associative simulation data,
Wherein the designated frequency band is the working frequency range that the mobile terminal is supported；
If the interference value reaches preset value, designated frequency band write-in frequency range is evaded into list；
The frequency range is evaded into list and imports the mobile terminal, so that mobile terminal evades list to work according to the frequency range
Frequency range is adjusted, radio frequency interference caused by avoiding the MCLK frequency because of working frequency range and camera from clashing.
7. anti-interference data analysis equipment as claimed in claim 6, which is characterized in that obtain mobile terminal when execution is described
When the step of the harmonic power value of the master clock MCLK time-domain signal of camera, the processor is also used to execute the computer
Program, to perform the steps of
Obtain the MCLK time-domain signal；
Fast Fourier transform is carried out to the MCLK time-domain signal and generates spectrum signal figure；
The harmonic power value of the MCLK time-domain signal is obtained according to the spectrum signal figure.
8. anti-interference data analysis equipment as claimed in claim 6, which is characterized in that described according to the harmonic wave function executing
When rate value and the associative simulation data calculate the step of the interference value of the corresponding MCLK times of frequency point of designated frequency band, the processor
It is also used to execute the computer program, to perform the steps of
Simulation process is carried out to the isolation between the antenna and camera according to the associative simulation data, obtains the finger
Determine the corresponding MCLK times of frequency point of frequency range and isolation；
The difference for calculating the harmonic power value and the isolation obtains the MCLK times of frequency point in the antenna current feed port
Noise；
The conducted susceptibility of the designated frequency band and the difference of the noise are calculated, the interference value is obtained.
9. a kind of mobile terminal, which is characterized in that the mobile terminal includes: memory, processor and is stored in described deposit
On reservoir and the computer program that can run on the processor, the computer program are realized when being executed by the processor
Following steps:
When detecting camera starting, the current communication channel of mobile terminal is obtained；
It inquires the frequency range prestored and evades list, judge that the frequency range evades whether list contains the communication channel；
Believe if so, the communication channel of the mobile terminal is switched to and is not included in other communications that the frequency range is evaded in list
Road,
Wherein, it is the frequency point with the MCLK of the camera of the mobile terminal that the frequency range, which evades the communication channel for including in list,
The channel of conflict.
10. a kind of computer readable storage medium, which is characterized in that be stored with computer on the computer readable storage medium
Program realizes that the camera as described in any one of claims 1 to 5 is anti-interference when the computer program is executed by processor
The step of method.
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| CN201811443990.0A CN109274437B (en) | 2018-11-29 | 2018-11-29 | Camera anti-interference method and device and computer readable storage medium |
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| CN201811443990.0A CN109274437B (en) | 2018-11-29 | 2018-11-29 | Camera anti-interference method and device and computer readable storage medium |
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