CN205336296U - Wireless shield assembly - Google Patents
Wireless shield assembly Download PDFInfo
- Publication number
- CN205336296U CN205336296U CN201620087998.8U CN201620087998U CN205336296U CN 205336296 U CN205336296 U CN 205336296U CN 201620087998 U CN201620087998 U CN 201620087998U CN 205336296 U CN205336296 U CN 205336296U
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- Prior art keywords
- panel
- controlled oscillator
- voltage controlled
- radio
- shielding device
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- Expired - Fee Related
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- 230000003321 amplification Effects 0.000 claims description 12
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 12
- 241000274582 Pycnanthus angolensis Species 0.000 claims description 11
- 239000011087 paperboard Substances 0.000 claims description 11
- 230000008054 signal transmission Effects 0.000 claims description 11
- 230000001815 facial effect Effects 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 3
- WYROLENTHWJFLR-ACLDMZEESA-N queuine Chemical compound C1=2C(=O)NC(N)=NC=2NC=C1CN[C@H]1C=C[C@H](O)[C@@H]1O WYROLENTHWJFLR-ACLDMZEESA-N 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 4
- 238000001228 spectrum Methods 0.000 abstract description 4
- 230000002452 interceptive effect Effects 0.000 abstract 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model relates to a shield assembly belongs to the teaching equipment field, concretely relates to wireless shield assembly. Including fixing the panel at the table leg top, be provided with wireless shield assembly on the panel, wireless shield assembly includes a plurality of unit frequency channel interfering signal transmitting circuits, unit frequency channel interfering signal transmitting circuit include: waveform generator, voltage controlled oscillator, radio frequency power amplifier and antenna, waveform generator links to each other with voltage controlled oscillator, and voltage controlled oscillator links to each other with the radio frequency power amplifier, and the antenna is connected to the radio frequency power amplifier. Therefore, the utility model has the advantages of as follows: 1. Can carry out the identification and gather examinee's mug shot, prevent to practise fraud, 2. The cycle of scanning whole radio spectrums is extremely short, avoids radio communication cheating equipment to send cheating information at a plurality of frequency points, 3. Only produce the less scope in desk place and disturb, prevent the regional wireless interference in non - examination hall.
Description
Technical field
This utility model relates to a kind of screening arrangement, belongs to teaching equipment field, is specifically related to a kind of wireless shielding device。
Background technology
The desk that current school uses, all has the table case of dress stationery, to facilitate student。When examination, often there is student by being ensconced in table case by books, or books are clipped between boxboard and lower limb, carry out plagiarizing cheating；What also have is practised fraud by replacement identity card, student's identity card photo。
On the other hand, various mobile equipment being utilized to practise fraud examination place people, it is therefore desirable to shielding device carrys out disabling signal, during due to examination, the examination hall that relates to is more, it is necessary to substantial amounts of effectively shield device。And existing shielding device application band scope is little and the air interference intensity in region, non-examination hall is big。
Utility model content
This utility model mainly solves technical problem above-mentioned existing for prior art, it is provided that a kind of wireless shielding device。This device is reasonable in design, simple in construction, and cost is low and completely practical, it is possible to carries out identification and gathers examinee's mug shot, it is prevented that cheating；And the cycle scanning whole radio-frequency spectrum is extremely short, avoid radio communication cheating equipment to send cheating information at multiple frequencies, make cheating information opened be transferred in cribber's hands, in addition, only desk place smaller range is produced interference, it is prevented that the air interference to region, non-examination hall。
Above-mentioned technical problem of the present utility model is addressed mainly by following technical proposals:
A kind of wireless shielding device, including the panel being fixed on table leg top, described panel is provided with wireless shielding device, described wireless shielding device includes multiple unit band interference signal transmission circuit, described unit band interference signal transmission circuit includes: waveform generator, voltage controlled oscillator, radio-frequency (RF) power amplification and antenna, waveform generator is connected with voltage controlled oscillator, and voltage controlled oscillator is connected with radio-frequency (RF) power amplification, and radio-frequency (RF) power amplification connects antenna。
Optimize, above-mentioned a kind of wireless shielding device, output capacitor C1 in described waveform generator connects with the resistance R1 in voltage controlled oscillator, outfan in voltage controlled oscillator connects through the base stage of electric capacity C3 with resistance R2, R4 in unit band interference signal transmission circuit and audion Q, electric capacity C4 two ends connect with audion Q base stage and emitter stage, meanwhile, electric capacity C4 one end connects with electric capacity C5 and the emitter stage of output triode Q connects with resistance R5 end, resistance R5 other end ground connection。
Optimizing, above-mentioned a kind of wireless shielding device, also include the boxboard being positioned at bottom panel, boxboard is fixed on bottom panel by the folding rod of panel both sides, and the boxboard hook corresponding with being fixed with position on panel and pin。
Optimizing, above-mentioned a kind of wireless shielding device, described panel is fixed with and is connected to facial recognition instrument, identity card recognizing instrument and student's identity card bar code identifier with server；And described facial recognition instrument, identity card recognizing instrument and student's identity card bar code identifier pass through radio receiving transmitting module Connection Service device。
Therefore, this utility model has the advantage that 1. is reasonable in design, simple in construction, and cost is low and completely practical；2. can carry out identification and gather examinee's mug shot, it is prevented that cheating；3. the cycle scanning whole radio-frequency spectrums is extremely short, it is to avoid radio communication cheating equipment sends cheating information at multiple frequencies, makes cheating information opened be transferred in cribber's hands；4. desk place smaller range is produced interference, it is prevented that the air interference to region, non-examination hall。
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is wireless shielding apparatus structure block diagram of the present utility model；
Fig. 3 is wireless shielding device circuit schematic diagram of the present utility model。
Detailed description of the invention
By the examples below, and in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail。
In figure, table leg 1, panel 2, voltage controlled oscillator 3, folding rod 4, pin 5, hook 6, identity card recognizing instrument 7, student's identity card bar code identifier 8, facial recognition instrument 9, wireless shielding device 10, waveform generator 101, voltage controlled oscillator 102, radio-frequency (RF) power amplification 103, antenna 104。
Embodiment:
As it is shown in figure 1, a kind of wireless shielding device, including the panel 2 being fixed on table leg 1 top, boxboard 3 is positioned at bottom panel, and boxboard is fixed on bottom panel by the folding rod 4 of panel both sides, and the boxboard hook 6 corresponding with being fixed with position on panel and pin 5。Panel is fixed with the facial recognition instrument 9, identity card recognizing instrument 7 and student's identity card bar code identifier 8, the wireless shielding device 10 that are connected with server, and facial recognition instrument 9, identity card recognizing instrument 7 and student's identity card bar code identifier 8 are by radio receiving transmitting module Connection Service device。
During use, first folding rod is packed up, boxboard and panel are secured together, and fix with pin by linking up with。The data that carry out that the identity card of examinee, student's identity card are sent in server by wireless data transceiver module with face image information are compared by facial recognition instrument, identity card recognizing instrument and student's identity card bar code identifier, identify examinee's identity reality。
As Figure 2-3, wireless shielding device 10 includes multiple unit band interference signal transmission circuit 1, described unit band interference signal transmission circuit l includes waveform generator 2, voltage controlled oscillator 3, radio-frequency (RF) power amplification 4 and antenna 5, waveform generator 2 is connected with voltage controlled oscillator 3, voltage controlled oscillator 3 is connected with radio-frequency (RF) power amplification 4, and radio-frequency (RF) power amplification 4 connects antenna 5。
Output capacitor C1 in waveform generator 2 connects with the resistance R1 in voltage controlled oscillator 3, outfan in voltage controlled oscillator 3 connects through the base stage of electric capacity C3 with resistance R2, R4 in unit band interference signal transmission circuit 1 and audion Q, electric capacity C4 two ends connect with audion Q base stage and emitter stage, simultaneously, electric capacity C4 one end connects with electric capacity C5 and the emitter stage of output triode Q connects with resistance R5 end, resistance R5 other end ground connection。
Basic ideas of the present utility model are that whole radio-frequency spectrums are divided into multiple frequency range, make multiple unit band interference signal transmission circuit, each unit band interference signal transmission circuit carries out periodic scan frequency in its frequency range according to some cycles and is transmitted in the air by interference signal, utilizes the principle that strong signal covers weak signal that the cheating information of any frequency is disturbed。Its basic functional principle is the control signal being produced some cycles by waveform generator, control signal makes the frequency of voltage controlled oscillator periodically change, it is transmitted in the air by radio-frequency (RF) power amplification by being amplified by the interference signal of voltage controlled oscillator again, it is achieved equipment that radio communication is practised fraud carries out disturbing at the scan-type of a certain frequency range。Wherein control signal is the staircase waveform utilizing Single-chip Controlling to produce certain frequency。
Specific embodiment described herein is only to this utility model spirit explanation for example。Described specific embodiment can be made various amendment or supplements or adopt similar mode to substitute by this utility model person of ordinary skill in the field, but without departing from spirit of the present utility model or surmount the scope that appended claims is defined。
Although more employing the terms such as table leg 1, panel 2, voltage controlled oscillator 3, folding rod 4, pin 5, hook 6, identity card recognizing instrument 7, student's identity card bar code identifier 8, facial recognition instrument 9, wireless shielding device 10, waveform generator 101, voltage controlled oscillator 102, radio-frequency (RF) power amplification 103, antenna 104 herein, but it is not precluded from using the probability of other term。These terms are used to be only used to describe and explain essence of the present utility model more easily；It is all contrary with this utility model spirit for being construed as any additional restriction。
Claims (4)
1. a wireless shielding device, it is characterized in that, including the panel (2) being fixed on table leg (1) top, it is characterized in that, described panel (2) is provided with wireless shielding device (10), described wireless shielding device (10) includes multiple unit band interference signal transmission circuit, described unit band interference signal transmission circuit includes: waveform generator (101), voltage controlled oscillator (102), radio-frequency (RF) power amplification (103) and antenna (104), waveform generator (101) is connected with voltage controlled oscillator (102), voltage controlled oscillator (102) is connected with radio-frequency (RF) power amplification (103), radio-frequency (RF) power amplification (103) connects antenna (104)。
2. a kind of wireless shielding device according to claim 1, it is characterized in that, output capacitor C1 in described waveform generator (2) connects with the resistance R1 in voltage controlled oscillator (3), outfan in voltage controlled oscillator (3) connects through the base stage of electric capacity C3 with resistance R2, R4 in unit band interference signal transmission circuit (1) and audion Q, electric capacity C4 two ends connect with audion Q base stage and emitter stage, simultaneously, electric capacity C4 one end connects with electric capacity C5 and the emitter stage of output triode Q connects with resistance R5 end, resistance R5 other end ground connection。
3. a kind of wireless shielding device according to claim 1, it is characterized in that, also include the boxboard (3) being positioned at panel (2) bottom, boxboard (3) is fixed on panel (2) bottom by the folding rod (4) of panel (2) both sides, and the boxboard hook (6) corresponding with being fixed with position on panel and pin (5)。
4. a kind of wireless shielding device according to claim 1, it is characterised in that described panel is fixed with and is connected to facial recognition instrument (9), identity card recognizing instrument (7) and student's identity card bar code identifier (8) with server；And described facial recognition instrument (9), identity card recognizing instrument (7) and student's identity card bar code identifier (8) are by radio receiving transmitting module Connection Service device。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620087998.8U CN205336296U (en) | 2016-01-28 | 2016-01-28 | Wireless shield assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620087998.8U CN205336296U (en) | 2016-01-28 | 2016-01-28 | Wireless shield assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205336296U true CN205336296U (en) | 2016-06-22 |
Family
ID=56316874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620087998.8U Expired - Fee Related CN205336296U (en) | 2016-01-28 | 2016-01-28 | Wireless shield assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205336296U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107566884A (en) * | 2017-08-24 | 2018-01-09 | 深圳创维－Rgb电子有限公司 | A kind of connection method, service end and terminal |
| CN108322701A (en) * | 2018-01-25 | 2018-07-24 | 上海理工大学 | Examination hall video monitoring and mobile phone signal shielding system |
-
2016
- 2016-01-28 CN CN201620087998.8U patent/CN205336296U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107566884A (en) * | 2017-08-24 | 2018-01-09 | 深圳创维－Rgb电子有限公司 | A kind of connection method, service end and terminal |
| CN107566884B (en) * | 2017-08-24 | 2020-03-03 | 深圳创维－Rgb电子有限公司 | Connection method, server and terminal |
| CN108322701A (en) * | 2018-01-25 | 2018-07-24 | 上海理工大学 | Examination hall video monitoring and mobile phone signal shielding system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160622 |