CN101354412A - Apparatus for testing electromagnetic radiation strength - Google Patents
Apparatus for testing electromagnetic radiation strength Download PDFInfo
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- CN101354412A CN101354412A CNA200810141776XA CN200810141776A CN101354412A CN 101354412 A CN101354412 A CN 101354412A CN A200810141776X A CNA200810141776X A CN A200810141776XA CN 200810141776 A CN200810141776 A CN 200810141776A CN 101354412 A CN101354412 A CN 101354412A
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Abstract
The invention discloses a device used for testing the electromagnetic radiation intensity, comprising an antenna used for receiving signals transmitted by a movable terminal, a band-pass filter used for filtrating the interference in the received transmitting signals, a rectifier and a low-pass filter used for rectifying filtrating the signals output by the previous step with low-pass and obtaining the analog signals, and an output module used for outputting the obtained analog signals. The device of the invention uses a test method, is additionally provided with an antenna and a radio frequency circuit and can exactly obtain the SAR value.
Description
Technical field
The present invention relates to field of mobile terminals, relate in particular to a kind of device of testing electromagnetic radiation strength.
Background technology
Along with pay attention to day by day to environment and health, countries in the world all are exposed to wherein electromagnetic field (EMF to human body respectively, Electromagnetic Field) stipulate, but because the regulation of electromagnetic field involves each side's interests, various countries is also inconsistent to the regulation that electromagnetic field exposes limit value.1998, the co-ordination of EMF standard was set about carrying out by The World Health Organization (WHO).In May, 2003, CENELEC (CENELEC) has issued the EN50366 standard, standard the measurement and the appraisal procedure of household appliances electromagnetic fields.The implementation date of EN50366 standard is on February 1st, 2004, and promptly after this date, the product of all these critical fields all must meet the requirement of EMF before sticking on the CE sign.
When people used mobile phone, mobile phone can transmit radiowave to transmitting base station, and any radiowave more or less can be absorbed by the body, and this radiowave just is called mobile phone radiation.Mobile phone produces bigger high frequency radiation field intensity when being in search network and talking state.Although there is not clear and definite scientific basis to illustrate that this radiation field has much harm to human body at present, it has been common recognition that there is harm in this situation.
At present, (refer to specific absorbtion ratio, be exactly the absorption ratio of special frequency channel to industry, and unit is w/kg with SAR.It is exactly the electromagnetic radiance that every kilogram human body absorbs in the mobile phone radiation maximum.The SAR value is more little, shows that radiation is slight more) or EMF (EMF, Electromagnetic Field, electromagnetic field) dual mode the high frequency radiation field intensity that mobile phone produces is limited.For example, the mobile phone that electromagnetic radiation intensity surpasses a threshold value does not allow to sell in the market, and the radiation field intensity with mobile phone is limited under certain value in this way.For example, Chinese mobile phone radiation standard is decided to be 2.0 watts/kilogram.Generally speaking, mobile phone producer all provides the SAR parameter of product can be for consumer inquiry, and many mobile phone producers also show explanation in this respect in the instructions of own product or official website.
Though the high frequency radiation field intensity is limited, for example, China's mobile phone radiation standard fixed surpasses the mobile phone that is decided to be 2.0 watts/kilogram and does not allow to sell in the market, but, the user can not obtain the electromagnetic radiation intensity that mobile phone produces in real time, the propaganda of cell phone manufacturer or medium can only not passively be believed in impression intuitively.Particularly, the environment of the actual use of the method for testing of SAR and mobile phone has than big difference, and its test result can not truly reflect electromagnetic radiation intensity.
Summary of the invention
The invention provides a kind of testing electromagnetic radiation strength device, allow the user can obtain the electromagnetic radiation intensity of equipment such as mobile phone in real time.
The objective of the invention is to be achieved through the following technical solutions:
Comprise: antenna is used for transmitting of mobile terminal receive; Bandpass filter is used for the filtering interfering that transmits that receives from described; Rectifier, low-pass filter carry out obtaining simulating signal after rectification and the low-pass filtering to the prime output signal; And output module, be used to export above-mentioned acquisition simulating signal.
The application adopts the means of test, lays antenna and radio circuit in addition, can obtain the SAR value accurately, in real time.
Description of drawings
Fig. 1 is the apparatus structure synoptic diagram of embodiment of the invention testing electromagnetic radiation strength;
Fig. 2 is the apparatus structure synoptic diagram of further embodiment of this invention testing electromagnetic radiation strength;
Fig. 3 is the apparatus structure synoptic diagram of further embodiment of this invention testing electromagnetic radiation strength.
Embodiment
Run through instructions, the preferred embodiment that illustrates and example should be counted as example of the present invention and be not used in restriction protection scope of the present invention.
As one embodiment of the present of invention, a kind of device of testing electromagnetic radiation strength is provided, adopt the means of test.Be specially a newly-increased radio-frequency antenna and radio circuit,, obtain the greatest irradiation amount that mobile phone produces by testing the field intensity that this newly-increased antenna receives.As shown in Figure 2, present embodiment specifically comprises as lower unit:
Antenna is used to receive mobile phone signal, and this antenna can be laid on the handset single-plate.
Radio circuit is used to obtain electromagnetic radiation intensity, and this raddiating circuit can comprise bandpass filter, gain control circuit, rectifier and low-pass filter, next introduces each unit in detail:
Bandpass filter, ordinary skill people is known, bandpass filter can allow the signal of certain frequency range to pass through, and suppresses to be below or above signal, interference and the noise of this frequency range, and its working frequency range is set to the employed frequency range of mobile phone sending signal in the present embodiment.The signal filtering interfering that the mobile phone that bandpass filter is used for receiving from described antenna sends is specially, and the radiofrequency signal that the filtering mobile phone sends from the signal that antenna receives is the undesired signal that produces of electric wire port herein.
Gain control circuit is controlled at level in the suitable scope, and the radiation field intensity that mobile phone produces may be at times strong and at other times weak, in order to guarantee the accurate of test result, uses gain control circuit controls output level size.This circuit is optional, if but do not use, may cause test result inaccurate.
Rectifier, low-pass filter: obtain the envelope of prime output signal, just range signal.The effect of the known rectification circuit of ordinary skill people is that alternating current is converted to direct current, voltage behind overcommutation (electric current) remains the direct current of " pulsation ", in order to reduce fluctuation, usually to add wave filter, and the effect of filtering circuit is that big Rectified alternating current is processed into the little direct current of level and smooth pulsation, adopt low-pass filter in the embodiment of the invention, allow low frequency or DC component in the signal to pass through, suppress high fdrequency component or interference and noise.
Output module is used to export above-mentioned acquisition range signal, and when the some or all of functional unit that utilizes mobile phone itself to carry was realized, this output module comprised:
AD conversion unit: convert the continuous voltage or the current analog amount of low-pass filter output to discrete digital quantity by sampling.
Main control unit: the main control unit that mobile phone itself carries, the electromagnetic radiation numerical value AD conversion unit obtains outputs to Tip element.
Tip element: be used to export the electromagnetic radiation prompting.Utilize the combination of a kind of or several persons in vision that mobile phone carries, sound, the sense of touch output function unit.Tip element comprises one or several the combination in vision that mobile phone carries, sound, the sense of touch output function unit, by video (numerical value, color, brightness), audio frequency (loudness, content), sense of touch (vibration) or above combination in any prompting user.For example, when Tip element comprised the video output function unit of mobile phone, the display screen that can carry mobile phone showed SAR numerical value intuitively as video output function unit, also can display screen different colours or brightness color; When Tip element comprises the audio output function unit of mobile phone, can make audio output unit that mobile phone carries by loudness, brightness or its in conjunction with the different SAR value of expression, for example, the big more loudness of SAR value is big more, the audio content difference of the different outputs of SAR value, the perhaps combination of the two; When Tip element comprises the sense of touch output function unit of mobile phone, the two the combination of the vibration frequency that SAR value that can be different is different, the intensity latter.Below only provided the independent work of every kind of mode for example, in the practical application, it can also be combination in any with upper type, for example, Tip element comprises when video output function unit, audio output function unit and sense of touch output unit make up arbitrarily, output video and audio prompt simultaneously, perhaps output video, audio frequency and sense of touch prompting simultaneously.
As another embodiment of the present invention, Tip element provides outside the above-mentioned prompting, when SAR surpasses threshold value, this threshold value can equal but be not limited to the value of standard code, and main control unit can also indicate Tip element to provide warning with one or several the combination in vision, sound, the sense of touch output function unit.
As another embodiment of the present invention, when all adopting, output module is independent of mobile phone, and when realizing by the what's new unit, at this moment, this electromagnetic radiation proving installation is totally independent of mobile phone.Output module also comprises:
Amplifier: the continuous voltage or the current analog amount of low-pass filter output are amplified by amplifier, be used to drive Tip element, this amplifier is optional.If but do not use, under the too little situation of prime output, possibly can't drive Tip element.
Tip element: the prompting that is used to export electromagnetic radiation intensity.Signal after the amplification drives vision (screen or diode etc.), sound (for example, Mike), sense of touch (for example, motor) output function unit.
As another embodiment of the present invention, this output module can also comprise comparing unit, be used for the signal of low-pass filter output and the level threshold value of radiation intensity are compared, when this signal is above standard the radiation intensity of stipulating, just indicate Tip element output warning or prompting, otherwise, do not export warning.
Advantages such as present embodiment can accurately obtain the SAR value, simultaneously, because the function of Tip element is realized in the partial function unit that adopts mobile phone to carry, need not newly-increased Tip element, can reduce cost, and dwindles circuit scale, and volume is small and exquisite.
Present embodiment adopts the means of test, is independent of the existing antenna of mobile phone, lays antenna and radio circuit in addition, can accurately obtain the SAR value.
As another embodiment of the present invention, be independent of the electromagnetic radiation proving installation of mobile phone among the last embodiment, can be embedded in mobile phone inside, can also make a radio-frequency field proving installation that is independent of mobile phone, can arbitrarily be tested the radiation intensity of optional position by the user voluntarily, this module is positioned near user's head in some way.
As another embodiment of the present invention, this proving installation can also be embedded in the equipment such as external earphone, MIC, when using external earphone, when MIC converses, testing the radiation intensity of user's periphery.
Obviously, the mobile phone of mentioning in the embodiment of the invention can be any form portable terminal, perhaps needs to test the equipment of receiving and transmitting signal radiation intensity.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. the device of a testing electromagnetic radiation strength is characterized in that, comprising:
Antenna is used for transmitting of mobile terminal receive;
Bandpass filter is used for the filtering interfering that transmits that receives from described;
Rectifier, low-pass filter carry out obtaining simulating signal after rectification and the low-pass filtering to the prime output signal; With
Output module is used to export above-mentioned acquisition simulating signal.
2. device according to claim 1 is characterized in that, described output module specifically comprises:
AD conversion unit is with the analog signal conversion digital signal of described low-pass filter output;
Main control unit, the main control unit that mobile phone itself carries, the electromagnetic radiation numerical value AD conversion unit obtains outputs to Tip element;
Tip element, the prompting that is used to export electromagnetic radiation intensity.
3. device according to claim 2 is characterized in that, described main control unit also is used for indicating described Tip element to provide warning when electromagnetic radiation intensity surpasses threshold value
4. device according to claim 1 is characterized in that described device also comprises gain control circuit, is used for the signal from the described filtering interfering of described bandpass filter is exported to described rectifier after the control level scope.
5. according to any described device of claim 1-4, it is characterized in that described device is embedded among portable terminal, earphone or the Mike.
6. device according to claim 1 is characterized in that, described output module specifically comprises:
Tip element, the prompting that is used to export electromagnetic radiation intensity.
7. device according to claim 6 is characterized in that described output module also comprises amplifier, will amplify from described low-pass filter simulating signal, exports to described Tip element.
8. device according to claim 6, it is characterized in that described output module also comprises comparing unit, be used for the signal of low-pass filter output and the level threshold value of radiation intensity are compared, when this signal is above standard the radiation intensity of stipulating, indication Tip element output warning.
9. according to any described device of claim 6-8, it is characterized in that described device is embedded among external earphone or the Mike.
10. according to claim 1,2,3,4,6,7 or 8 any described devices, it is characterized in that described Tip element comprises the combination of a kind of or several persons in vision, sound, the sense of touch output function unit.
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| CNA200810141776XA CN101354412A (en) | 2008-08-28 | 2008-08-28 | Apparatus for testing electromagnetic radiation strength |
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| CNA200810141776XA CN101354412A (en) | 2008-08-28 | 2008-08-28 | Apparatus for testing electromagnetic radiation strength |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147436A (en) * | 2011-02-23 | 2011-08-10 | 那鸿书 | Pocket-size multifunctional radiation out-of-limit prompting instrument |
| CN102447941A (en) * | 2010-10-09 | 2012-05-09 | Tcl集团股份有限公司 | Television electromagnetic radiation control system and control method thereof |
| CN102685774A (en) * | 2012-05-23 | 2012-09-19 | 上海安费诺永亿通讯电子有限公司 | Mobile telephone antenna HAC (Hearing Aid Compatibility) or SAR (Specific Absorption Rate) test system and HAC test method |
| CN103293403A (en) * | 2012-02-29 | 2013-09-11 | 比亚迪股份有限公司 | Method for debugging signal transduction and antenna |
| CN103323683A (en) * | 2013-06-09 | 2013-09-25 | 中国科学院深圳先进技术研究院 | Portable electromagnetic wave strength detecting device and method |
| CN103364643A (en) * | 2013-06-27 | 2013-10-23 | 东信和平科技股份有限公司 | Energy measuring method and device for radio frequency card reader, and energy measuring instrument |
| CN103439586A (en) * | 2013-09-10 | 2013-12-11 | 大连理工大学 | Measuring apparatus for measuring indoor electromagnetic radiation and measuring method thereof |
| CN103514716A (en) * | 2013-09-25 | 2014-01-15 | 广东欧珀移动通信有限公司 | Method and device for intelligently preventing mobile phone radiation |
| CN103516366A (en) * | 2013-09-26 | 2014-01-15 | 中科院微电子研究所昆山分所 | Input signal intensity indicator and indicating method |
| CN103995188A (en) * | 2014-05-27 | 2014-08-20 | 天津大学 | Full-band radio-frequency signal detecting and locating device and method capable of carrying out single frequency band detection |
| CN104655941A (en) * | 2015-03-24 | 2015-05-27 | 联想(北京)有限公司 | Electromagnetic radiation detection method and device and electronic equipment |
| CN104977477A (en) * | 2014-04-10 | 2015-10-14 | 广州杰赛科技股份有限公司 | Radiation detection device based on audio interface |
| CN104977476A (en) * | 2014-04-10 | 2015-10-14 | 广州杰赛科技股份有限公司 | Electromagnetic radiation detection method based on audio interface |
| CN104980566A (en) * | 2014-04-10 | 2015-10-14 | 广州杰赛科技股份有限公司 | Radiation detection warning system based on audio interface |
| CN105242121A (en) * | 2015-11-13 | 2016-01-13 | 南京信息职业技术学院 | Portable electromagnetic radiation survey meter |
| CN105450863A (en) * | 2014-09-25 | 2016-03-30 | 中兴通讯股份有限公司 | Multiple-protection terminal |
| CN106034350A (en) * | 2015-03-13 | 2016-10-19 | 神讯电脑(昆山)有限公司 | Electronic device and power regulation method of wireless module |
| WO2016187865A1 (en) * | 2015-05-28 | 2016-12-01 | 苏州佑克骨传导科技有限公司 | Bluetooth warning headset device with electromagnetic radiation test function |
| CN111693786A (en) * | 2019-03-14 | 2020-09-22 | 罗德施瓦兹两合股份有限公司 | System and method for real-time visualization of a radiometric map |
| CN113364534A (en) * | 2020-03-04 | 2021-09-07 | 佛山市云米电器科技有限公司 | Antenna testing method, device and computer readable storage medium |
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Cited By (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447941A (en) * | 2010-10-09 | 2012-05-09 | Tcl集团股份有限公司 | Television electromagnetic radiation control system and control method thereof |
| CN102147436A (en) * | 2011-02-23 | 2011-08-10 | 那鸿书 | Pocket-size multifunctional radiation out-of-limit prompting instrument |
| CN103293403B (en) * | 2012-02-29 | 2015-08-26 | 比亚迪股份有限公司 | The adjustment method of a kind of intracellular signaling and antenna |
| CN103293403A (en) * | 2012-02-29 | 2013-09-11 | 比亚迪股份有限公司 | Method for debugging signal transduction and antenna |
| CN102685774A (en) * | 2012-05-23 | 2012-09-19 | 上海安费诺永亿通讯电子有限公司 | Mobile telephone antenna HAC (Hearing Aid Compatibility) or SAR (Specific Absorption Rate) test system and HAC test method |
| CN103323683A (en) * | 2013-06-09 | 2013-09-25 | 中国科学院深圳先进技术研究院 | Portable electromagnetic wave strength detecting device and method |
| CN103323683B (en) * | 2013-06-09 | 2015-10-28 | 中国科学院深圳先进技术研究院 | A kind of portable electromagnetic wave intensity detecting device and method |
| CN103364643A (en) * | 2013-06-27 | 2013-10-23 | 东信和平科技股份有限公司 | Energy measuring method and device for radio frequency card reader, and energy measuring instrument |
| CN103439586A (en) * | 2013-09-10 | 2013-12-11 | 大连理工大学 | Measuring apparatus for measuring indoor electromagnetic radiation and measuring method thereof |
| CN103439586B (en) * | 2013-09-10 | 2016-03-09 | 大连理工大学 | A kind of measurement mechanism for measuring indoor electromagnetic radiation and measuring method thereof |
| CN103514716B (en) * | 2013-09-25 | 2016-05-25 | 广东欧珀移动通信有限公司 | The method and apparatus of the anti-mobile phone radiation of a kind of intelligence |
| CN103514716A (en) * | 2013-09-25 | 2014-01-15 | 广东欧珀移动通信有限公司 | Method and device for intelligently preventing mobile phone radiation |
| CN103516366B (en) * | 2013-09-26 | 2017-01-18 | 中科院微电子研究所昆山分所 | Input signal intensity indicator and indicating method |
| CN103516366A (en) * | 2013-09-26 | 2014-01-15 | 中科院微电子研究所昆山分所 | Input signal intensity indicator and indicating method |
| CN104980566A (en) * | 2014-04-10 | 2015-10-14 | 广州杰赛科技股份有限公司 | Radiation detection warning system based on audio interface |
| CN104977476A (en) * | 2014-04-10 | 2015-10-14 | 广州杰赛科技股份有限公司 | Electromagnetic radiation detection method based on audio interface |
| CN104977477A (en) * | 2014-04-10 | 2015-10-14 | 广州杰赛科技股份有限公司 | Radiation detection device based on audio interface |
| CN103995188A (en) * | 2014-05-27 | 2014-08-20 | 天津大学 | Full-band radio-frequency signal detecting and locating device and method capable of carrying out single frequency band detection |
| CN103995188B (en) * | 2014-05-27 | 2017-02-15 | 天津大学 | Full-band radio-frequency signal detecting and locating device and method capable of carrying out single frequency band detection |
| US9992315B2 (en) | 2014-09-25 | 2018-06-05 | Zte Corporation | Terminal and terminal multiple protection method |
| CN105450863A (en) * | 2014-09-25 | 2016-03-30 | 中兴通讯股份有限公司 | Multiple-protection terminal |
| CN105450863B (en) * | 2014-09-25 | 2019-05-21 | 中兴通讯股份有限公司 | A kind of terminal of multiple-protection |
| CN106034350A (en) * | 2015-03-13 | 2016-10-19 | 神讯电脑(昆山)有限公司 | Electronic device and power regulation method of wireless module |
| CN106034350B (en) * | 2015-03-13 | 2020-04-10 | 神讯电脑(昆山)有限公司 | Electronic device and power adjusting method of wireless module thereof |
| CN104655941A (en) * | 2015-03-24 | 2015-05-27 | 联想(北京)有限公司 | Electromagnetic radiation detection method and device and electronic equipment |
| CN104655941B (en) * | 2015-03-24 | 2018-08-10 | 联想(北京)有限公司 | Detection method of electromagnetic radiation, device and electronic equipment |
| WO2016187865A1 (en) * | 2015-05-28 | 2016-12-01 | 苏州佑克骨传导科技有限公司 | Bluetooth warning headset device with electromagnetic radiation test function |
| CN105242121A (en) * | 2015-11-13 | 2016-01-13 | 南京信息职业技术学院 | Portable electromagnetic radiation survey meter |
| CN111693786A (en) * | 2019-03-14 | 2020-09-22 | 罗德施瓦兹两合股份有限公司 | System and method for real-time visualization of a radiometric map |
| CN113364534A (en) * | 2020-03-04 | 2021-09-07 | 佛山市云米电器科技有限公司 | Antenna testing method, device and computer readable storage medium |
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Application publication date: 20090128 |