CN104316778A - Spatial electromagnetic frequency spectrum detection method - Google Patents
Spatial electromagnetic frequency spectrum detection method Download PDFInfo
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- CN104316778A CN104316778A CN201410635992.5A CN201410635992A CN104316778A CN 104316778 A CN104316778 A CN 104316778A CN 201410635992 A CN201410635992 A CN 201410635992A CN 104316778 A CN104316778 A CN 104316778A
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Abstract
The invention relates to a spatial electromagnetic frequency spectrum detection method in the electromagnetic radiation detection field. The spatial electromagnetic frequency spectrum detection method is especially suitable for a portable radiation detection system having detection requirements for radiation frequency spectrum distribution. A spatial electromagnetic radiation signal is transferred to a certain fixed intermediate frequency band through components such as a mixer and a local oscillator for narrow-band power detection, and the frequency band where the radiation signal is located can be precisely judged. According to the detection method, detection precision is high, design difficulty is low, the integration level is high, the method is easy to implement, and portable and even wearable application is achieved.
Description
Technical field
The present invention relates to a kind of spatial electromagnetic frequency spectrum detecting method in electromagnet radiation detection field, be specially adapted to portable radiant detection system radiation frequency spectrum being distributed with to testing requirement.
Background technology
Traditional portable electromagnetic radiation detection system, directly carries out detection by broadband detector to the electromagnetic wave signal that antenna receives, can only detect the electromagnetic radiation intensity that residing environment is total.To detect the radiation intensity of frequency range residing for electromagnetic radiation and each frequency range, this method is difficult to realize.
Summary of the invention
Technical matters to be solved by this invention is avoid the weak point in above-mentioned background and provide a kind of spatial electromagnetic frequency spectrum detecting method.By increasing the parts such as frequency mixer and local oscillator, accurately can judge frequency range residing for spacing electromagnetic radiation signal, accuracy of detection is high, and integrated level is high, easily realizes portable even wearable application.
The invention provides a kind of spatial electromagnetic frequency spectrum detecting method.
Present invention also offers a kind of spatial electromagnetic frequency spectrum detection device.
A kind of spatial electromagnetic frequency spectrum detecting method, is characterized in that comprising step:
1) antenna receives spacing electromagnetic radiation signal, is divided into two-way broadband rf signal to export by shunt;
2) wherein a road broadband rf signal enters broadband power detection module, carries out signal amplification, detection, obtains the detecting circuit value of characterization signal intensity, exports to microcontroller after carrying out A/D conversion to it;
3) microcontroller is judged ELECTROMAGNETIC RADIATION SIGNATURE intensity by detecting circuit value, if be less than defined threshold, then decision space electromagnetic environment is normal, does not have radiation risk, and exports corresponding information, terminates spatial electromagnetic frequency spectrum detecting method; If ELECTROMAGNETIC RADIATION SIGNATURE intensity is greater than defined threshold, then enter step 4)
4) microprocessor controls local oscillator module, the radiofrequency signal exporting a certain regulation frequency to frequency mixer, carries out mixing by frequency mixer to another road broadband rf signal that shunt exports as local oscillation signal;
5) the mixing intermediate-freuqncy signal after mixing enters filter filtering, obtains the narrowband intermediate frequency signal characterizing a certain frequency sub-band frequency spectrum in broadband rf signal;
6) narrowband intermediate frequency signal enters narrow band power detection module, carries out signal amplification, detection, obtains the detecting circuit value characterizing a certain frequency sub-band spectrum signal intensity, exports to microcontroller after carrying out A/D conversion to it;
7) microprocessor controls local oscillator module, changes it and exports frequency, repeat step 4) ~ 6), obtain the data characterizing another frequency sub-band spectrum signal intensity, iteration like this, until scanned by the whole broader frequency spectrum measured that needs;
8) microcontroller carries out record to each frequency sub-band spectrum signal intensity, and exports the signal intensity profile information of each frequency sub-band in whole frequency band to be measured, terminates spatial electromagnetic frequency spectrum detecting method.
A kind of spatial electromagnetic frequency spectrum detection device, it comprises: Anneta module (1), splitter module (2), broadband power detection module (3), micro controller module (4), local oscillator module (5), mixer module (6), filter module (7), narrow band power detection module (8), wherein: Anneta module (1) is for receiving spacing electromagnetic radiation signal and exporting to splitter module (2), splitter module (2) is for being divided into two-way broadband rf signal by signal and exporting to broadband power detection module (3) and mixer module (5), broadband power detection module (3) amplifies for the road broadband rf signal exported splitter module (2), detection and A/D conversion, micro controller module (4) is for the detecting circuit after the digitizing that receives broadband power detection module (3) and narrow band power detection module (8) and export, by detecting circuit, judgement is entered to ELECTROMAGNETIC RADIATION SIGNATURE intensity, if be less than defined threshold, then decision space electromagnetic environment is normal, there is no radiation risk, and export corresponding information, if ELECTROMAGNETIC RADIATION SIGNATURE intensity is greater than defined threshold, then control local oscillator module (5) and make its radiofrequency signal exporting a certain regulation frequency as local oscillation signal to frequency mixer, micro controller module (4) is also for carrying out record to each frequency sub-band spectrum signal intensity, and export the signal intensity profile information of each frequency sub-band in whole frequency band to be measured, local oscillator module (5) for export regulation frequency radiofrequency signal to mixer module (6) as local oscillation signal, mixer module (6) carries out mixing for another road broadband rf signal exported splitter module (2), obtains mixing intermediate-freuqncy signal, filter module (7) obtains characterizing the narrowband intermediate frequency signal of a certain frequency sub-band radiation signal for carrying out filtering to mixing intermediate-freuqncy signal and outputs it to narrow band power detection module (8), narrow band power detection module (8) for amplifying narrowband intermediate frequency signal, detection and A/D conversion, obtain the detecting circuit characterizing a certain frequency sub-band radiated signal strength.
The present invention is compared with background technology, and tool has the following advantages:
1, the spatial electromagnetic frequency spectrum detecting method that proposes of the present invention, compared with traditional power detecting method, adds the parts such as local oscillator and frequency mixer, ensure that the accurate detection to frequency range residing for radiation signal.And narrow band power detection module carries out detection at a fixing intermediate-frequency band to signal, accuracy of detection is high.
2, each parts of the present invention design difficulty under current technical conditions is little, and can be integrated on one piece of printed circuit board, volume, weight, power consumption are less, and fiduciary level is high, easily realizes portable even wearable application.
Accompanying drawing explanation
Fig. 1 is the block scheme according to spatial electromagnetic frequency spectrum detection device of the present invention.
Fig. 2 is the process flow diagram according to spatial electromagnetic frequency spectrum detecting method of the present invention.
Embodiment
Spatial electromagnetic frequency spectrum detection device as shown in Figure 1 comprises Anneta module 1, splitter module 2, broadband power detection module 3, micro controller module 4, local oscillator module 5, mixer module 6, filter module 7, narrow band power detection module 8.Wherein broadband power detection module 3 generally comprises the parts such as amplifier, wave detector, A/D transducer, local oscillator module 5 generally comprises the parts such as reference clock, phase detector, loop filter, VC0, and narrow band power detection module 8 generally comprises the parts such as amplifier, wave detector, A/D transducer.Anneta module 1 receives spacing electromagnetic radiation signal and exports to splitter module 2, signal is divided into two-way broadband rf signal and exports to broadband power detection module 3 and mixer module 5 by splitter module 2, the road broadband rf signal that the broadband power detection module 3 pairs of splitter modules 2 export amplifies, detection and A/D conversion, micro controller module 4 receives the detecting circuit after the digitizing of broadband power detection module 3 and narrow band power detection module 8 output, by detecting circuit, ELECTROMAGNETIC RADIATION SIGNATURE intensity is judged, if be less than defined threshold, then decision space electromagnetic environment is normal, there is no radiation risk, and export corresponding information, if ELECTROMAGNETIC RADIATION SIGNATURE intensity is greater than defined threshold, then control local oscillator module 5 and make its radiofrequency signal exporting a certain regulation frequency as local oscillation signal to frequency mixer, micro controller module 4 is also for carrying out record to each frequency sub-band spectrum signal intensity, and export the signal intensity profile information of each frequency sub-band in whole frequency band to be measured, , local oscillator module 5 exports and specifies the radiofrequency signal of frequency to mixer module 6 as local oscillation signal, another road broadband rf signal that mixer module 6 pairs of splitter modules 2 export carries out mixing, obtains mixing intermediate-freuqncy signal, filter module 7 carries out filtering to mixing intermediate-freuqncy signal and obtains characterizing the narrowband intermediate frequency signal of a certain frequency sub-band radiation signal and output it to narrow band power detection module 8, narrow band power detection module 8 pairs of narrowband intermediate frequency signals amplify, detection and A/D conversion, obtain the detecting circuit characterizing a certain frequency sub-band radiated signal strength.
Spatial electromagnetic frequency spectrum detecting method as shown in Figure 2 comprises the following steps:
1) antenna receives spacing electromagnetic radiation signal, and be divided into two-way broadband rf signal to export by shunt, embodiment has been come by the Anneta module 1 in Fig. 1 and splitter module 2;
2) wherein a road broadband rf signal enters broadband power detection module, carry out signal amplification, detection, obtain the detecting circuit value of characterization signal intensity, export to microcontroller after carrying out A/D conversion to it, embodiment has been come by the broadband power detection module 3 in Fig. 1;
3) microcontroller enters judgement by detecting circuit value to ELECTROMAGNETIC RADIATION SIGNATURE intensity, if be less than defined threshold, then decision space electromagnetic environment is normal, does not have radiation risk, and exports corresponding information, detection of end method; If ELECTROMAGNETIC RADIATION SIGNATURE intensity is greater than defined threshold, then enters step 4 embodiment and come by the micro controller module 4 in Fig. 1;
4) microprocessor controls local oscillator module, the radiofrequency signal exporting a certain regulation frequency as local oscillation signal to frequency mixer, carry out mixing by frequency mixer to another road broadband rf signal that shunt exports, embodiment has been come by the micro controller module 4 in Fig. 1, local oscillator module 5 and mixer module 6;
5) the mixing intermediate-freuqncy signal after mixing enters filter filtering, and obtain the narrowband intermediate frequency signal characterizing a certain frequency sub-band frequency spectrum in broadband rf signal, embodiment has been come by the filter module 7 in Fig. 1;
6) narrowband intermediate frequency signal enters narrow band power detection module, carry out signal amplification, detection, obtain the detecting circuit value characterizing a certain frequency sub-band spectrum signal intensity, export to microcontroller after carrying out A/D conversion to it, embodiment has been come by the narrow band power detection module 8 in Fig. 1;
7) microprocessor controls local oscillator module, change it and export frequency, repeat step 4 ~ 6, obtain the data characterizing another frequency sub-band spectrum signal intensity, iteration like this, until scanned by the whole broader frequency spectrum measured that needs, embodiment has been come by the micro controller module 4 in Fig. 1, local oscillator module 5, mixer module 6, filter module 7 and narrow band power detection module 8;
8) microcontroller carries out record to each frequency sub-band spectrum signal intensity, and exports the signal intensity profile information of each frequency sub-band in whole frequency band to be measured, and embodiment has been come by the micro controller module 4 in Fig. 1.
Claims (2)
1. a spatial electromagnetic frequency spectrum detecting method, is characterized in that comprising step:
1) antenna receives spacing electromagnetic radiation signal, is divided into two-way broadband rf signal to export by shunt;
2) wherein a road broadband rf signal enters broadband power detection module, carries out signal amplification, detection, obtains the detecting circuit value of characterization signal intensity, exports to microcontroller after carrying out A/D conversion to it;
3) microcontroller is judged ELECTROMAGNETIC RADIATION SIGNATURE intensity by detecting circuit value, if be less than defined threshold, then decision space electromagnetic environment is normal, does not have radiation risk, and exports corresponding information, terminates spatial electromagnetic frequency spectrum detecting method; If ELECTROMAGNETIC RADIATION SIGNATURE intensity is greater than defined threshold, then enter step 4)
4) microprocessor controls local oscillator module, the radiofrequency signal exporting a certain regulation frequency to frequency mixer, carries out mixing by frequency mixer to another road broadband rf signal that shunt exports as local oscillation signal;
5) the mixing intermediate-freuqncy signal after mixing enters filter filtering, obtains the narrowband intermediate frequency signal characterizing a certain frequency sub-band frequency spectrum in broadband rf signal;
6) narrowband intermediate frequency signal enters narrow band power detection module, carries out signal amplification, detection, obtains the detecting circuit value characterizing a certain frequency sub-band spectrum signal intensity, exports to microcontroller after carrying out A/D conversion to it;
7) microprocessor controls local oscillator module, changes it and exports frequency, repeat step 4) ~ 6), obtain the data characterizing another frequency sub-band spectrum signal intensity, iteration like this, until scanned by the whole broader frequency spectrum measured that needs;
8) microcontroller carries out record to each frequency sub-band spectrum signal intensity, and exports the signal intensity profile information of each frequency sub-band in whole frequency band to be measured, terminates spatial electromagnetic frequency spectrum detecting method.
2. a spatial electromagnetic frequency spectrum detection device, it comprises: Anneta module (1), splitter module (2), broadband power detection module (3), micro controller module (4), local oscillator module (5), mixer module (6), filter module (7), narrow band power detection module (8), wherein: Anneta module (1) is for receiving spacing electromagnetic radiation signal and exporting to splitter module (2), splitter module (2) is for being divided into two-way broadband rf signal by signal and exporting to broadband power detection module (3) and mixer module (5), broadband power detection module (3) amplifies for the road broadband rf signal exported splitter module (2), detection and A/D conversion, micro controller module (4) is for the detecting circuit after the digitizing that receives broadband power detection module (3) and narrow band power detection module (8) and export, by detecting circuit, judgement is entered to ELECTROMAGNETIC RADIATION SIGNATURE intensity, if be less than defined threshold, then decision space electromagnetic environment is normal, there is no radiation risk, and export corresponding information, if ELECTROMAGNETIC RADIATION SIGNATURE intensity is greater than defined threshold, then control local oscillator module (5) and make its radiofrequency signal exporting a certain regulation frequency as local oscillation signal to frequency mixer, micro controller module (4) is also for carrying out record to each frequency sub-band spectrum signal intensity, and export the signal intensity profile information of each frequency sub-band in whole frequency band to be measured, local oscillator module (5) for export regulation frequency radiofrequency signal to mixer module (6) as local oscillation signal, mixer module (6) carries out mixing for another road broadband rf signal exported splitter module (2), obtains mixing intermediate-freuqncy signal, filter module (7) obtains characterizing the narrowband intermediate frequency signal of a certain frequency sub-band radiation signal for carrying out filtering to mixing intermediate-freuqncy signal and outputs it to narrow band power detection module (8), narrow band power detection module (8) for amplifying narrowband intermediate frequency signal, detection and A/D conversion, obtain the detecting circuit characterizing a certain frequency sub-band radiated signal strength.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106569044A (en) * | 2016-11-02 | 2017-04-19 | 西安电子科技大学 | Immersive virtual reality system-based electromagnetic spectrum situation observation method |
| CN106771668A (en) * | 2017-01-05 | 2017-05-31 | 西南交通大学 | A kind of electromagnetic radiation parameter test system |
| CN107356819A (en) * | 2016-05-10 | 2017-11-17 | 中国人民解放军理工大学 | A kind of intelligent domestic electromagnetic radiation information service system |
| CN107782980A (en) * | 2016-08-31 | 2018-03-09 | 桂林 | A kind of intelligent wearable device for measuring wireless radiation |
| CN109756243A (en) * | 2018-12-27 | 2019-05-14 | 深圳市有方科技股份有限公司 | Antenna detection device and antenna detection method |
| CN113452158A (en) * | 2021-05-28 | 2021-09-28 | 北京理工大学 | Environmental electromagnetic wave energy acquisition system |
| CN113949450A (en) * | 2021-12-03 | 2022-01-18 | 北京恒鸣智控科技有限公司 | Radio frequency signal monitoring method and system |
-
2014
- 2014-11-13 CN CN201410635992.5A patent/CN104316778A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107356819A (en) * | 2016-05-10 | 2017-11-17 | 中国人民解放军理工大学 | A kind of intelligent domestic electromagnetic radiation information service system |
| CN107356819B (en) * | 2016-05-10 | 2019-11-15 | 中国人民解放军理工大学 | A kind of intelligent domestic electromagnetic radiation information service system |
| CN107782980A (en) * | 2016-08-31 | 2018-03-09 | 桂林 | A kind of intelligent wearable device for measuring wireless radiation |
| CN106569044A (en) * | 2016-11-02 | 2017-04-19 | 西安电子科技大学 | Immersive virtual reality system-based electromagnetic spectrum situation observation method |
| CN106771668A (en) * | 2017-01-05 | 2017-05-31 | 西南交通大学 | A kind of electromagnetic radiation parameter test system |
| CN109756243A (en) * | 2018-12-27 | 2019-05-14 | 深圳市有方科技股份有限公司 | Antenna detection device and antenna detection method |
| CN113452158A (en) * | 2021-05-28 | 2021-09-28 | 北京理工大学 | Environmental electromagnetic wave energy acquisition system |
| CN113949450A (en) * | 2021-12-03 | 2022-01-18 | 北京恒鸣智控科技有限公司 | Radio frequency signal monitoring method and system |
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