CN202475436U - A frequency spectrum monitor of cheating-information-containing radio signal in an examination room - Google Patents
A frequency spectrum monitor of cheating-information-containing radio signal in an examination room Download PDFInfo
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- CN202475436U CN202475436U CN2012200449229U CN201220044922U CN202475436U CN 202475436 U CN202475436 U CN 202475436U CN 2012200449229 U CN2012200449229 U CN 2012200449229U CN 201220044922 U CN201220044922 U CN 201220044922U CN 202475436 U CN202475436 U CN 202475436U
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Abstract
A frequency spectrum monitor of cheating-information-containing radio signal in an examination room is characterized in that the monitor mainly comprises an omnidirectional antenna array (1), a signal-receiving unit (2), a frequency scanner (3), a mixer (4), a signal amplifier (5), a filter (6), a wave detector (7), a signal analysis processor (8), a system controller (9), an information memory cell (10), a human-machine interactive interface (11), and a network communication interface (12). The frequency spectrum monitor has simple structure and wide monitoring scope, achieving remote control.
Description
Technical field
The utility model relates to a kind of wireless signal monitor; Especially a kind of characteristics to the wireless cheating of current high-tech; The spectrum monitoring appearance of the multiband that carries out scanning monitoring wireless electricity cheating signal specifically a kind ofly is used to monitor the full frequency band examination hall radio cheating signal spectrum monitor that examination makes to cover wireless signal.
Background technology
At present, along with development of wireless communication devices, the behavior that utilizes wireless signal in the examination hall, to practise fraud at present is also increasing, and the mode of wireless signal cheating at present is classified as following several kinds of modes:
1. through the mobile phone signal cheating
(1) utilize the SMS passage to send the cheating mode of answer to cribber's the mobile phone.
(2) utilize the cheating mode of mobile phone+audio frequency transponder+concealed earphone: the examinee carries mobile phone, audio frequency transponder and concealed earphone; Obtain outside the venue to dial examinee's mobile phone after the answer; Mobile phone is set to quiet and auto-pickup; And through earphone interface speech is received on the audio frequency transponder, the audio frequency transponder through on examinee's neck or between waist or the coil on the clothes speech is converted into the magnetic field with sound variation, though so the magnetic bodies in the action of a magnetic field scope all can to produce this vibration of the vibration the same with sound very faint; But, utilize the high sensitivity of people's ear can not hear the sound of generation because concealed earphone is positioned on duct, ear-drum or the oral cavity.
2. through the cheating of particular frequency bands radio signal
(1) utilize the communication of pin hole shooting+microwave wireless to carry out image transmission cheating mode: through the communication of pin hole shooting+microwave wireless from the examination hall to unofficial biography paper image to steal paper; It uses the frequency range of microwave to be generally 1.2GHz or 2.4GHz frequency; The cribber that the acceptance point distance is carried transmitter generally also can be accompanied by outside the venue and command the cribber who carries camera to carry out moving of paper through speech ciphering equipments such as intercoms in 300 meters.
(2) utilize intercom+transceiver machine+concealed earphone cheating mode: this mode with utilize mobile phone+audio frequency transponder+concealed earphone cheating mode similar; Only be to use the receiving system of intercom or other similar intercoms to replace mobile phone, avoid the interference of mobile phone shielding device.
(3) utilize particular frequency bands to count transmission transmitter+number and pass the mode of practising fraud that receives: these characteristics are that it is disguised strong; Receiving terminal often disguised oneself as pen, wrist-watch, ruler, rubber, spectacle case, belt fastener or the like; And answer information is stored with written form; Liquid crystal display is equivalent to beep-pager on the function, can transmit bigger literal amount at short notice.The transmission speed of data transmission equipment is very fast, generally can reach 2400～9600bps, is equivalent to more than 50～200 Chinese character of per second transmission, and in fact owing to added verification and error correcting code, real transmission speed is about 20～80 Chinese characters.It is more that number passes the cheating functions of the equipments, comprises filtering duplicate message and error message, and moment destroys data function and uses the remote control pen to come page turning and switch screen etc.
The cheating of particular frequency bands radio signal is to use maximum radio cheating modes at present, takies more than 3/4 of present cheating equipment.Sometimes can use powerful vehicle radio station to improve the distance of cheating outside the venue, the frequency of receiver can realize frequency hopping through computer, and therefore disguised and anti-shielding interference performance is strong.
For effective monitoring wireless electricity cheating signal; Must carry out continual monitoring to the wireless signal in 50MHz～2500MHz frequency range; Grasp the appearance situation of the abnormal signal in the examination point scope and the signal of practising fraud in real time; Through can in time grasping the cheating signal to the monitor signal analysis in single examination hall, district (county), city (area), province, the range of countries, the firsthand information and foundation are provided for analyzing and resisting wireless cheating in each the regional and national distribution situation and the development of fraudulent means.Also can cooperate the position of public security department and Wireless Management Committee location cheating emission source simultaneously, in time find and arrest cheating clique through the networking of examination hall spectrum monitoring appearance.
Summary of the invention
The purpose of the utility model is wide to the wireless signal scope that cheats at one's exam, and diverse problem designs a kind of examination hall radio cheating signal spectrum monitor that can realize all frequency range cheating radio signals of monitoring.
The technical scheme of the utility model is:
A kind of examination hall radio cheating signal spectrum monitor; It is characterized in that it mainly is made up of omni-directional antenna arrays 1, signal receiving unit 2, fescan 3, frequency mixer 4, signal amplifier 5, filter 6, wave detector 7, signal analysis and processing device 8, system controller 9, information memory cell 10, Man Machine Interface 11 and network communication interface 12; Near the omni-directional antenna arrays 1 reception monitoring point in the certain limit radio signal also is transferred to signal receiving unit 2 with signal; Fescan 3 produces swept-frequency signal under the control of system controller 9; 4 pairs of signal receiving units of frequency mixer 2 carry out mixing with the signal that fescan 3 transmits; Through signal amplifier 5 and filter 6 signal is sent into wave detector 7; Wave detector 7 is input to signal analysis and processing device 8 with rectified signal; But the frequency of 8 pairs of suspect signals of signal analysis and processing device detects and locatees and related data is sent to system controller 9; But the relevant information in information memory cell 10 storage monitoring places and the characteristic frequency of detected suspect signal; Man-machine interactive operation interface 11 receives operating personnel's key command and realizes showing through LED or LCD, and system controller 9 is transferred to information such as the relevant information of monitoring such as suspicious cheating signal frequency range, time, input place in the information combined data platform of relevant monitoring department with network mode through network communication interface 12.
Described omni-directional antenna arrays 1 is made up of mobile phone down going channel and WLAN aerial array, 50～820MHz full frequency band aerial array, voice coil and power detecting unit.
The beneficial effect of the utility model:
1. the utility model can effectively detect all the suspicious cheating signals in 50MHz～2500MHz frequency range, comprising: mobile communication frequency range, WLAN communications band, 50MHz--820MHz frequency range.
2. can produce multiple frequency sweep waveforms such as sine wave, triangular wave, sawtooth waveforms, staircase waveform, square wave, random frequency hopping by micro-processor controlled fescan 3, effectively detect the wireless cheating signal of multiple possibility frequency modulation.
3. the utlity model has the network data transmission function, can utilize network to carry out large-scale data acquisition and gather, for the cheating situation of understanding each area and the distribution situation examination hall in the whole nation in real time provides technical guarantee.
4. the network communication interface unit 12 of the utility model can receive the remote operation instruction of other relevant devices; Realization remote operation control; This multiple spot that is examination hall radio cheating signal spectrum monitor is laid, and the Installation and Debugging workload that reduces commissioning staff's quantity and improve equipment is offered help.
Description of drawings
Fig. 1 be the utility model be to form the system structured flowchart.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
As shown in Figure 1.
A kind of examination hall radio cheating signal spectrum monitor; It mainly is made up of omni-directional antenna arrays 1, signal receiving unit 2, fescan 3, frequency mixer 4, signal amplifier 5, filter 6, wave detector 7, signal analysis and processing device 8, system controller 9, information memory cell 10, Man Machine Interface 11 and network communication interface 12; Near the omni-directional antenna arrays 1 reception monitoring point in the certain limit radio signal also is transferred to signal receiving unit 2 with signal; Fescan 3 produces swept-frequency signal under the control of system controller 9; 4 pairs of signal receiving units of frequency mixer 2 carry out mixing with the signal that fescan 3 transmits; Through signal amplifier 5 and filter 6 signal is sent into wave detector 7; Wave detector 7 is input to signal analysis and processing device 8 with rectified signal; But the frequency of 8 pairs of suspect signals of signal analysis and processing device detects and locatees and related data is sent to system controller 9; But the relevant information in information memory cell 10 storage monitoring places and the characteristic frequency of detected suspect signal; Man-machine interactive operation interface 11 receives operating personnel's key command and realizes showing through LED or LCD, and system controller 9 is transferred to information such as the relevant information of monitoring such as suspicious cheating signal frequency range, time, input place in the information combined data platform of relevant monitoring department with network mode through network communication interface 12.As shown in Figure 1, described omni-directional antenna arrays 1 is made up of mobile phone down going channel and WLAN aerial array, 50～820MHz full frequency band aerial array, voice coil and power detecting unit, and the band limits that omni-directional antenna arrays 1 can be monitored is as shown in table 1.
The present invention does not relate to all identical with the prior art prior art that maybe can adopt of part and realizes.
Claims (2)
1. examination hall radio cheating signal spectrum monitor; It is characterized in that it mainly is made up of omni-directional antenna arrays (1), signal receiving unit (2), fescan (3), frequency mixer (4), signal amplifier (5), filter (6), wave detector (7), signal analysis and processing device (8), system controller (9), information memory cell (10), Man Machine Interface (11) and network communication interface (12); Omni-directional antenna arrays (1) receives near the interior radio signal of the certain limit in monitoring point and signal is transferred to signal receiving unit (2); Fescan (3) produces swept-frequency signal under the control of system controller (9); Frequency mixer (4) carries out mixing to the signal that signal receiving unit (2) and fescan (3) transmit; Through signal amplifier (5) and filter (6) signal is sent into wave detector (7); Wave detector (7) is input to signal analysis and processing device (8) with rectified signal; Signal analysis and processing device (8) but the frequency of suspect signal is detected and locatees and related data is sent to system controller (9); Information memory cell (10) but the relevant information in storage monitoring place and the characteristic frequency of detected suspect signal; Man-machine interactive operation interface (11) receives operating personnel's key command and realizes showing that through LED or LCD system controller (9) is transferred to the relevant information of monitoring in the information combined data platform of relevant monitoring department with network mode through network communication interface (12).
2. examination hall according to claim 1 radio cheating signal spectrum monitor is characterized in that described omni-directional antenna arrays (1) is made up of mobile phone down going channel and WLAN aerial array, 50～820MHz full frequency band aerial array, voice coil and power detecting unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200449229U CN202475436U (en) | 2012-02-13 | 2012-02-13 | A frequency spectrum monitor of cheating-information-containing radio signal in an examination room |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200449229U CN202475436U (en) | 2012-02-13 | 2012-02-13 | A frequency spectrum monitor of cheating-information-containing radio signal in an examination room |
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| Publication Number | Publication Date |
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| CN202475436U true CN202475436U (en) | 2012-10-03 |
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| CN2012200449229U Expired - Lifetime CN202475436U (en) | 2012-02-13 | 2012-02-13 | A frequency spectrum monitor of cheating-information-containing radio signal in an examination room |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103067654A (en) * | 2013-01-29 | 2013-04-24 | 杭州中威电子股份有限公司 | Video camera with radio detection and spectrum display function |
| CN104853381A (en) * | 2015-05-18 | 2015-08-19 | 北京欣易晨科技发展股份有限公司 | Broadband radio frequency and spectrum resource monitoring system and method |
| CN107290712A (en) * | 2016-03-31 | 2017-10-24 | 北京中密安信息安全技术有限公司 | Secret and safe checks monitoring car |
| CN117580081A (en) * | 2024-01-15 | 2024-02-20 | 成都大公博创信息技术有限公司 | Major activity guarantee command control system |
-
2012
- 2012-02-13 CN CN2012200449229U patent/CN202475436U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103067654A (en) * | 2013-01-29 | 2013-04-24 | 杭州中威电子股份有限公司 | Video camera with radio detection and spectrum display function |
| CN103067654B (en) * | 2013-01-29 | 2016-03-30 | 杭州中威电子股份有限公司 | A kind of video camera with radio detection and spectrum display function |
| CN104853381A (en) * | 2015-05-18 | 2015-08-19 | 北京欣易晨科技发展股份有限公司 | Broadband radio frequency and spectrum resource monitoring system and method |
| CN104853381B (en) * | 2015-05-18 | 2019-11-08 | 北京欣易晨科技发展股份有限公司 | Wide-band radio frequency and frequency spectrum resource monitor system and method |
| CN107290712A (en) * | 2016-03-31 | 2017-10-24 | 北京中密安信息安全技术有限公司 | Secret and safe checks monitoring car |
| CN117580081A (en) * | 2024-01-15 | 2024-02-20 | 成都大公博创信息技术有限公司 | Major activity guarantee command control system |
| CN117580081B (en) * | 2024-01-15 | 2024-03-19 | 成都大公博创信息技术有限公司 | Major activity guarantee command control system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zheng Liming Inventor after: Tu Jingsheng Inventor before: Tu Jingsheng Inventor before: Zheng Liming |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: TU JINGSHENG ZHENG LIMING TO: ZHENG LIMING TU JINGSHENG |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 210018 Nanjing, Jiangsu Xuanwu District, Zhujianglu Road, No. 88 New World Center, block A, 2308 Patentee after: Jiangsu Huaye Interregional Educational Science and Technology Development Co.,Ltd. Address before: 210018 Nanjing, Jiangsu Xuanwu District, Zhujianglu Road, No. 88 New World Center, block A, 2308 Patentee before: Jiangsu Hua Ye cross Education Technology Development Co.,Ltd. Address after: 210018 Nanjing, Jiangsu Xuanwu District, Zhujianglu Road, No. 88 New World Center, block A, 2308 Patentee after: Jiangsu Hua Ye cross Education Technology Development Co.,Ltd. Address before: 210018 Nanjing, Jiangsu Xuanwu District, Zhujianglu Road, No. 88 New World Center, block A, 2308 Patentee before: Jiangsu Cross Domain Information Technology Development Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20121003 |
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| CX01 | Expiry of patent term |