CN101998220A - Headset detecting device - Google Patents
Headset detecting device Download PDFInfo
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- CN101998220A CN101998220A CN2009100135046A CN200910013504A CN101998220A CN 101998220 A CN101998220 A CN 101998220A CN 2009100135046 A CN2009100135046 A CN 2009100135046A CN 200910013504 A CN200910013504 A CN 200910013504A CN 101998220 A CN101998220 A CN 101998220A
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Abstract
The invention discloses a headset detecting device, in particular relates to an improvement of a non-contact headset detecting device structure, which belongs to detecting equipment, and is mainly used for inspecting cheating by a stealth headset or audio sensing equipment in an examination hall. The headset detecting device of the invention is high in sensitivity and simple in structure. The headset detecting device comprises a microprocessor, a frequency-fixed transmitting circuit, an electromagnetic wave transmitting element and a sound wave receiving element, wherein the microprocessor is connected with other components, used for controlling an audio signal output by the frequency-fixed transmitting circuit and makes a judgment according to an electrical signal output by a frequency selection sound control circuit; the output end of the frequency-fixed transmitting circuit is connected with the electromagnetic wave transmitting element to output an audio driving signal under the control of the microprocessor; the electromagnetic wave transmitting element is driven by the driving signal output by the frequency-fixed transmitting circuit to transmit an electromagnetic wave; and the sound wave receiving element is used for receiving a sound wave generated by the stealth headset under the action of an audio electromagnetic wave transmitted by the electromagnetic wave transmitting element.
Description
Technical field:
The invention belongs to detecting devices, relate in particular to a kind of improvement of contactless earphone sniffer structure, be mainly used in and inspect the phenomenon of utilizing concealed earphone, audio frequency sensing equipment to practise fraud in the examination hall.
Background technology:
Along with the continuous development of electronic technology, the continuous progress of science and technology, electronic product makes rapid progress.At present, occurred a kind of new-type communication tool one concealed earphone in the society, it mainly contains two kinds, and a kind of is rare-earth type, and it mainly is to shake by the induction of ferromagnetic material in audio frequency magnetic field to vibrate duct and make the user hear sound; Also has a kind of active driving magnetic sheet of the induced electromotive force sound horn that mainly in audio frequency magnetic field, obtains by induction coil for electron type.
The concealed earphone biggest advantage is exactly that volume is little, and in this series products, what volume was little has only several millimeters, if place it in the duct, naked eyes are difficult to observe and obtain, and it is mainly used in fields such as criminal investigation.But, being subjected to the influence of social bad common practice, a few molecules in the society is applied to concealed earphone to monitor unlawful practices such as other people privacy, examination hall malpractices, has brought great harm to society, and the principle of the competition that is unfair.
The sniffer of existing concealed earphone has two kinds: a kind of is the electromagnetic wave detection dog, and this kind equipment can be good at detecting electromagnetic wave, but because there are problems such as too sensitive and polarization difference in its, what the signal that very difficult judgement measures is, comes wherefrom; Another kind is a metal detector; it can be to checking that object carries out contactless general physical checkup; its detection speed is slow; and very difficult grasp sensitivity; usually can occur because metal objects such as the belt buckle that the inspection object is worn on one's body, key, hair fastener, slide fasteners; and cause the warning device false alarm, to the staff and check that object makes troubles and perplex.
Summary of the invention:
The present invention is exactly at the problems referred to above, and a kind of highly sensitive, simple in structure earphone sniffer is provided.
For achieving the above object, the present invention adopts following technical scheme, and a kind of earphone sniffer comprises:
Microprocessor, it links to each other with miscellaneous part, is used to control the audio signal of frequency fixing emitting circuit output, and judges according to the signal of telecommunication by the input of frequency-selecting sound control circuit;
Frequency fixing emitting circuit, its output links to each other with the electromagnetic wave radiated element, output audio drive signal under the control action of microprocessor;
The electromagnetic wave radiated element, it is subjected to the driving of the drive signal that frequency fixing emitting circuit sends, transmitting audio frequency electromagnetic wave;
The sound wave receiving element is used to receive the sound wave that concealed earphone produces under the effect of the audio-frequency electric magnetic wave that the electromagnetic wave radiated element is launched;
The frequency-selecting sound control circuit, its input links to each other with the sound wave receiving element, and output links to each other with microprocessor, is used to receive the sound wave that the sound wave receiving element receives, and carries out sending into microprocessor after its conversion;
Warning circuit is used for sending alarm signal under the control action of microprocessor;
Magneto sensor is used for whether having magnetic field around the induction.
Described warning circuit is made up of light-emitting diode and loud speaker.
Beneficial effect of the present invention:
Because it is sniffer of the present invention is made up of devices such as microprocessor, frequency fixing emitting circuit, electromagnetic wave radiated element, transmitting audio frequency electromagnetic wave, sound wave receiving elements, therefore simple in structure, highly sensitive.
Description of drawings:
Fig. 1 is a schematic block circuit diagram of the present invention.
Embodiment:
As shown in Figure 1, a kind of earphone sniffer comprises: microprocessor, and it links to each other with miscellaneous part, is used to control the audio signal of frequency fixing emitting circuit output, and judges according to the signal of telecommunication by the input of frequency-selecting sound control circuit; Frequency fixing emitting circuit, its output links to each other with the electromagnetic wave radiated element, output audio drive signal under the control action of microprocessor; The electromagnetic wave radiated element, it is subjected to the driving of the drive signal that frequency fixing emitting circuit sends, transmitting audio frequency electromagnetic wave; The sound wave receiving element is used to receive the sound wave that concealed earphone produces under the effect of the audio-frequency electric magnetic wave that the electromagnetic wave radiated element is launched; The frequency-selecting sound control circuit, its input links to each other with the sound wave receiving element, and output links to each other with microprocessor, is used to receive the sound wave that the sound wave receiving element receives, and carries out sending into microprocessor after its conversion; Warning circuit is used for sending alarm signal under the control action of microprocessor; Magneto sensor is used for whether having magnetic field around the induction.
Described warning circuit is made up of light-emitting diode and loud speaker.
Below in conjunction with the description of drawings course of work of the present invention:
Under the control action of the main control circuit of sniffer of the present invention, frequency fixing emitting circuit sends audio-signal-driven audio wave radiated element transmitting audio frequency electromagnetic wave, if there is the people to use concealed earphone in the examination hall, then this electromagnetic wave is reduced into frequency sound by the concealed earphone in the certain limit, when the sound wave receiving element receives concealed earphone behind extraradial sound wave, the sound that picks up excites the frequency-selecting sound control circuit, the frequency-selecting sound control circuit passes to main control circuit with information, is reported to the police by main control circuit driving warning circuit driving indicator light and loud speaker again.
Claims (2)
1. an earphone sniffer is characterized in that, comprising:
Microprocessor, it links to each other with miscellaneous part, is used to control the audio signal of frequency fixing emitting circuit output, and judges according to the signal of telecommunication by the input of frequency-selecting sound control circuit;
Frequency fixing emitting circuit, its output links to each other with the electromagnetic wave radiated element, output audio drive signal under the control action of microprocessor;
The electromagnetic wave radiated element, it is subjected to the driving of the drive signal that frequency fixing emitting circuit sends, transmitting audio frequency electromagnetic wave;
The sound wave receiving element is used to receive the sound wave that concealed earphone produces under the effect of the audio-frequency electric magnetic wave that the electromagnetic wave radiated element is launched;
The frequency-selecting sound control circuit, its input links to each other with the sound wave receiving element, and output links to each other with microprocessor, is used to receive the sound wave that the sound wave receiving element receives, and carries out sending into microprocessor after its conversion;
Warning circuit is used for sending alarm signal under the control action of microprocessor;
Magneto sensor is used for whether having magnetic field around the induction.
2. a kind of earphone sniffer according to claim 1 is characterized in that described warning circuit is made up of light-emitting diode and loud speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100135046A CN101998220A (en) | 2009-08-28 | 2009-08-28 | Headset detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100135046A CN101998220A (en) | 2009-08-28 | 2009-08-28 | Headset detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101998220A true CN101998220A (en) | 2011-03-30 |
Family
ID=43787658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100135046A Pending CN101998220A (en) | 2009-08-28 | 2009-08-28 | Headset detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101998220A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104581607A (en) * | 2014-12-29 | 2015-04-29 | 六盘水达安驾驶培训有限公司 | In-ear wireless transmission anti-cheating device and anti-cheating method thereof |
| CN107290743A (en) * | 2016-04-01 | 2017-10-24 | 北京中密安信息安全技术有限公司 | Photography and vedio recording detection method of recording and detector |
-
2009
- 2009-08-28 CN CN2009100135046A patent/CN101998220A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104581607A (en) * | 2014-12-29 | 2015-04-29 | 六盘水达安驾驶培训有限公司 | In-ear wireless transmission anti-cheating device and anti-cheating method thereof |
| CN104581607B (en) * | 2014-12-29 | 2018-08-31 | 六盘水达安驾驶培训有限公司 | The anti-cheating device of the In-Ear wireless transmission of one kind and its anti-cheating method |
| CN107290743A (en) * | 2016-04-01 | 2017-10-24 | 北京中密安信息安全技术有限公司 | Photography and vedio recording detection method of recording and detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110330 |