CN206531976U - The active concealed earphone detector of auto-excitation type - Google Patents
The active concealed earphone detector of auto-excitation type Download PDFInfo
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- CN206531976U CN206531976U CN201720227256.5U CN201720227256U CN206531976U CN 206531976 U CN206531976 U CN 206531976U CN 201720227256 U CN201720227256 U CN 201720227256U CN 206531976 U CN206531976 U CN 206531976U
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Abstract
The active concealed earphone detector of auto-excitation type.Because there is limitation in the means of traditional lookup cheating earphone, so a kind of new simple for the with low cost of concealed earphone, operation in the urgent need to developing, suitable for the abuse of the examination hall technical precaution device, effectively preventing and treating concealed earphone of fixed invigilator's librarian use in examination hall.The utility model composition includes housing（9）, audio-frequency electric magnetic wave emission element is installed in described housing（1）, audio-frequency electric magnetic wave receiving part（2）, control unit（3）, audio-frequency power amplifier（4）, described control unit is connected with described audio-frequency power amplifier；Described audio-frequency power amplifier is connected with described audio-frequency electric magnetic wave emission element, audio-frequency electric magnetic wave receiving part respectively, and constitutes auto-excitation type oscillation circuit.The utility model is applied to the active concealed earphone detector of auto-excitation type.
Description
Technical field：
The utility model is related to a kind of active concealed earphone detector of auto-excitation type, more particularly to for stealth in a kind of examination hall
Counter practise fraud in the examination hall of earphone uses contact-free detection equipment.
Background technology：
With fast-developing, examination scale the continuous expansion of China's educational undertaking, some mechanisms and individual open in society
Begin to help examinee to reap staggering profits by taking an examination using high-tech means, college entrance examination in recent years, postgraduate qualifying examination, judicial examination, public affairs
High-tech cheating generally occurs for all kinds of examinations such as business person's examination, and these cheatings clique, commercialization, transregional increasingly
Domain, heavy damage examination is fair, just, therefore does a good job of it examination security work, improves examination hall technical precaution means, sets high-tech to order and examine
Study disadvantage turns into the top priority of examination authorities.
The high-tech equipment that cheats at one's exam mainly is divided to two kinds, i.e. the cheating equipment by the cheating equipment seen and by listening：
By the cheating equipment seen, exactly display screen be hidden into it is various can bring into the article in examination hall, such as：Band display function
Pen, lattice chi, calculator, wrist-watch, mess card, rubber etc., although these cheating equipment disguise oneself as different profiles, but use eye after all
Eyeball is gone to see answer, and this behavior for seeing answer of examinee easily causes the vigilance of invigilator personnel, and receiving high-tech, anti-business is examined in cheating
The invigilator personnel of training can quickly screen the cheating equipment used in examinee and prevent its cheating, due to being set by the cheating seen
It is standby easily to be discovered and seized so application at present is not extensive.
It is exactly that examinee receives cheating information, invigilator using the wireless invisible earpiece being put into duct by the cheating equipment listened
Personnel are difficult to find the cheating of examinee by routine visual means, therefore concealed earphone has turned into general in cheating in recent years
All over the equipment that cheats at one's exam used, examination security is seriously endangered.
Wireless invisible earpiece mainly has two kinds of passive and active type：Passive concealed earphone is usually by the strong magnetic material of rare earth
Expect the micromodule equipment inserted in duct that is made, the sounding by vibration that ferromagnetic material is produced under audio frequency magnetic field effect；Have
Source concealed earphone is usually the micromodule equipment for being placed in duct being made up of miniature coils, signal amplification circuit, loudspeaker and battery,
The induced-current produced by coil in audio frequency magnetic field, sound horn is driven by amplifying circuit.Above two is wireless stealthy ear
Machine need to being received with information, the receiver of audio-frequency electric magnetic wave emission function be used in conjunction with, in examination process examinee lean on receiver
Receive examination hall outside cheating clique transmitting answer voice messaging, then by receiver by answer voice messaging with audio electromagnetic field
Form radiate to listen to for examinee to wireless invisible earpiece and cheated at one's exam to realize.
The wireless invisible earpiece signal receiver external form occurred in recent years is various, and volume is less and less, frequency reception signal
Non- citizens' radio band even is taken, while the audio electromagnetic field of transmitting radiates also very little, and the power supply with hidden is opened
Close for cutting off transmission signal, such as mercoid switch, miniature key are switched, and these designs can effectively antagonize current examination hall technical precaution people
The detection of audio electromagnetic field detecting devices that member uses, therefore cheating clique is referred to as that counter to shield anti-detection wireless stealthy to examinee
Earphone, can will not be found by invigilator personnel, mislead examinee's trial of making a desperate move and cheat at one's exam.
Mainly there are following several ways currently for the anti-means of concealed earphone exam cheating operations：
1. the mode of the personnel of invigilator range estimation.Range estimation is that requirement examines business personnel during invigilator or tour, passes through naked eye
Whether obvious foreign matter is had in examinee's ear.Because the volume of concealed earphone is less and less, visual method is difficult to find examinee's duct
In foreign matter, in addition visual method and examine the working attitude of business personnel, light intensity, the dressing of examinee or hair decorations etc. have in field
Relation, the lookup mode of this concealed earphone is random big, and implementation effect is extremely limited.
Using metal detector is contactless search the person by the way of.Thing of the metal detector when examinee before setting the exam enters examination hall
Product examine is widely used in looking into, but concealed earphone signal receiver can blind scrutineer by the belt buckle that disguises oneself as, hair fastener, glasses etc.
Member checks and brings examination hall into, because metal detector sensitivity is limited, it is difficult to the concealed earphone in examinee's duct is detected, so
Concealed earphone can not be prevented examination hall implementation cheating is brought into by examinee.
Towards the link of concealed earphone receiver communication with the outside world, by searching or disturbing communication frequency to reach counter
The mode of cheating.
（1）Mobile communication signal shielding device.This equipment is generally disposed in examination hall, by improving mobile communication frequency range
Noise level, prevent mobile phone from base station proper communication, it is limited in that is used as information receiving device only for using mobile phone
Equipment of practising fraud is effective.
（2）Radiocommunication signals shield device.This equipment is generally disposed near examination hall, powerful same by launching
Frequency signal disturbs the reception signal of concealed earphone signal receiver, but as the frequency of cheating signal is different, further relates to sometimes
To control frequency range, therefore it can be restricted in terms of working frequency range and channel capacity.
（3）Specialty detection car and portable direction-finding equipment.This equipment is generally disposed outside examination hall, by monitoring car and just
Take formula direction-finding equipment to examination hall outside emission source searched and positioned, due to cheating signals disperse, the test time section in only
A small number of signals can be searched, and it is costly.
It is anti-to reach by lookup or interference tones electromagnetic field towards the communication link between concealed earphone receiver and earphone
Make the mode of disadvantage.
（1）Audio electro-magnetic signal detector.This equipment can monitor the audio electro-magnetic signal in examination hall, and according to audio
The Strength Changes of electromagnetic field determine cheating examinee position, but counter shield control of the anti-detection wireless concealed earphone with hidden and open
Close, when the switch is closed, audio electro-magnetic signal disappears, invigilator's librarian use audio electro-magnetic signal detector can not detect work again
Disadvantage signal, cause even if detect have in examination hall concealed earphone cheating be also difficult to determine carry concealed earphone cheating examine
It is raw.
（2）Concealed earphone is disturbed using wire laying mode transmitting audio electromagnetic field interference signal.This equipment is usual
It is deployed in examination hall, can effectively disturbs concealed earphone, but because the general quantity in examination hall is more, necessarily lead to using wire laying mode numerous
Miscellaneous workload, implements relatively difficult.
（3）Positioner is disturbed using Portable concealed earphone.This equipment utilization mancarried device is with sufficiently large work(
The audio-frequency electric magnetic wave of rate transmitting particular frequency range can effectively disturb fixed as interference positioning signal driving concealed earphone work
Position concealed earphone, the problem of solving the inconvenience deployment of wiring type audio electromagnetic field jamming equipment, but high-power audio electromagnetic field are sent out
Volume is big by factors such as transmitting coil diameter, power supplys for jet device, cost is high, is only applicable to flowing checking in examination hall, is not suitable for
It is used as the technical precaution equipment large-scale use that personnel's allocation is invigilated in examination hall.
Due to above-mentioned interference or the limitation that means are present is searched, so a kind of new for stealthy ear in the urgent need to developing
The with low cost of machine, operation are simple, it is adaptable to which the examination hall technical precaution device of fixed invigilator's librarian use in examination hall, effectively preventing and treating is stealthy
The abuse of earphone.
Utility model content：
The purpose of this utility model is to provide a kind of active concealed earphone detector of auto-excitation type.
Above-mentioned purpose is realized by following technical scheme：
A kind of active concealed earphone detector of auto-excitation type, its composition includes：Audio-frequency electric is installed in housing, described housing
Magnetic wave emission element, audio-frequency electric magnetic wave receiving part, control unit, audio-frequency power amplifier, described control unit with it is described
Audio-frequency power amplifier connection；Described audio-frequency power amplifier respectively with described audio-frequency electric magnetic wave emission element, audio
Electromagnetic wave receiving part is connected, and constitutes auto-excitation type oscillation circuit.
The active concealed earphone detector of described auto-excitation type, the input of described audio-frequency power amplifier is selected with function
Analog switch is connected, and described control unit is connected with described function selection analog switch, voice module respectively, described work(
Analog switch can be selected to be connected respectively with described voice module, described audio-frequency electric magnetic wave receiving part.
The active concealed earphone detector of described auto-excitation type, described control unit respectively with operating element, display unit
Connection.
The active concealed earphone detector of described auto-excitation type, described audio-frequency electric magnetic wave emission element is by one or more
The coil antenna of coil superposition composition, described audio-frequency electric magnetic wave receiving part is coil antenna or inductance.
The beneficial effects of the utility model：
1. operation principle of the present utility model is as described below：Two independent coils, a use are set in this detector
In transmitting electromagnetic wave, another is used to receive electromagnetic wave, receives the coil of electromagnetic wave as feedback circuit access transmitting electromagnetic wave
Circuit, so as to form self-oscillation.The free-run oscillation signal of formation is launched and can driven in audio-frequency electric magnetic wave mode through antenna
Dynamic active concealed earphone work, makes concealed earphone send howling, and the sound can clearly be heard by human ear in 2 two meters, so that
Invigilator personnel are made to find the examinee that practises fraud immediately.
The utility model is simple in construction, with low cost, and small volume is simple to operation, is easy to extensive fix with issuing examination hall
Invigilate librarian use, concealed earphone start or shut down and can all carry out checking and examining actively and passively, no dead angle.
The utility model can launch the cheating warning voice electromagnetism letter that only concealed earphone carrier can just receive
Number, such as：Your cheating equipment is had been observed that, cheating tool is please surrendered immediately, if do not surrender set the exam after by it is undisciplined processing etc. warning
Language, is broadcast before examination by the circulation in examination hall, is formed psychological pressure to the examinee that this plan is practised fraud, is recognized it hidden
Shape earphone counter can not be detected, promote its surrender cheating tool avoid the occurrence of it is undisciplined.
Brief description of the drawings：
Accompanying drawing 1 is structural representation of the present utility model.
Accompanying drawing 2 is another structural representation of the present utility model.
Accompanying drawing 3 is circuit theory diagrams of the present utility model.
Accompanying drawing 4 is the product design figure of this detector.In figure, 9 be housing.
Embodiment：
Embodiment 1：
A kind of active concealed earphone detector of auto-excitation type, its composition includes：Audio-frequency electric is installed in housing, described housing
Magnetic wave emission element 1, audio-frequency electric magnetic wave receiving part 2, control unit 3, audio-frequency power amplifier 4, described control unit with
Described audio-frequency power amplifier connection；Described audio-frequency power amplifier respectively with described audio-frequency electric magnetic wave emission element,
Audio-frequency electric magnetic wave receiving part is connected, and constitutes auto-excitation type oscillation circuit.Audio-frequency power amplifier and audio-frequency electric magnetic wave emission part
Part and audio-frequency electric magnetic wave receiving part constitute an auto-excitation type oscillation circuit, and audio-frequency electric magnetic wave emission element is launched during self-oscillation
Audio-frequency electric magnetostatic wave signal can drive active concealed earphone to send howling, wherein, the audio-frequency electric magnetic wave emission element is used to send out
Penetrate audio-frequency electric magnetic wave；The audio-frequency electric magnetic wave receiving part is used to receive audio-frequency electric magnetic wave, and exports electric signal；The audio work(
Rate amplifier is exported to audio-frequency electric magnetic wave emission element after being used for the electric signal amplification by the output of audio-frequency electric magnetic wave receiving part.
Embodiment 2：
The active concealed earphone detector of auto-excitation type according to embodiment 1, the input of described audio-frequency power amplifier
End is connected with function selection analog switch 5, and described control unit selects analog switch, voice module with described function respectively
6 connections, described function selection analog switch connects with described voice module, described audio-frequency electric magnetic wave receiving part respectively
Connect.
Embodiment 3：
The active concealed earphone detector of auto-excitation type according to embodiment 1 or 2, described control unit respectively with manipulation
Part 7, display unit 8 are connected.Described display unit is LED light or LCD display.
Embodiment 4：
The active concealed earphone detector of auto-excitation type according to embodiment 1 or 2 or 3, described audio-frequency electric magnetic wave transmitting
Part is superimposed the coil antenna constituted by one or more coils, and described audio-frequency electric magnetic wave receiving part is coil type day
Line or inductance.
Embodiment 5：
The active concealed earphone detector of auto-excitation type described in embodiment 1, its composition includes：Microprocessor（Control single
Member）, described microprocessor control end respectively with voice module, the control end of analog switch, the output end of microphone amplifier,
Input button and liquid crystal display circuit connection.Power amplifier is connected with driving transmitting coil, constitutes self-excitation audio oscillator circuit,
Exported by coil with means of electromagnetic waves, it act as actively launching concealed earphone detection signal and warning voice signal, microphone
The detection signal sent from cheating concealed earphone and warning voice signal are received, is amplified by microphone amplifier, can be through earphone
The A/D conversion process and the dual mode of detection of artificial monitoring and microprocessor are carried out, can be by headphone monitor, while liquid crystal
Show that circuit shows the level parameters detected, detection reliability can be effectively improved.With microprocessor D/A conversions to reception.
Audio detection signal is to be connected by transmitting coil with audio-frequency power amplifier output end, receiving coil and analog switch
One connection, analog switch output end three connection audio-frequency power amplifier input+.Audio is constituted certainly by internal electric capacity
Excited oscillation circuit output detection signal.Its output level amplitude is the A/D2 that microprocessor is connected by the other end of receiving coil
Input, its detection level information exported is shown in liquid crystal display circuit.
The audible alerts signal of its transmitting of phonetic warning signal is to connect analog switch input by voice module OUT terminal
Two, its output end three connection audio-frequency power amplifier input-, its output end OUT connection receiving coils.The voice module
Control end（CN）Connect microprocessor interface P2 ends.Phonetic warning or output audio detection signal are exported by analog switch controlled end
Connect the P2.6 controls of microprocessor.Export content（The selection of language section, playback, timing output）Controlled by the P2 of microprocessor
System.
The transmitting coil of cheating concealed earphone is receiving phonetic warning and audio detection signal detection and phonetic warning letter
Number it is to be exported by being transferred to cheating earphone, is received through the Mike and audio-frequency amplifier amplification point 2 tunnels output, 1 road to earphone
For invigilator personnel direct surveillance, another road is connected to the A/D1 inputs of microprocessor.Changed through microprocessor shaping, A/D, its
Detection level information is shown in liquid crystal display circuit.
Claims (5)
1. a kind of active concealed earphone detector of auto-excitation type, its composition includes：Audio-electromagnetically is installed in housing, described housing
Ripple emission element, audio-frequency electric magnetic wave receiving part, control unit, audio-frequency power amplifier, it is characterized in that：Described control unit
It is connected with described audio-frequency power amplifier；Described audio-frequency power amplifier respectively with described audio-frequency electric magnetic wave emission part
Part, the connection of audio-frequency electric magnetic wave receiving part, and constitute auto-excitation type oscillation circuit.
2. the active concealed earphone detector of auto-excitation type according to claim 1, it is characterized in that：Described Audio power amplifier
The input of device and function selection analog switch be connecteds, described control unit selected respectively with described function analog switch,
Voice module is connected, and described function selection analog switch is received with described voice module, described audio-frequency electric magnetic wave respectively
Part is connected.
3. the active concealed earphone detector of auto-excitation type according to claim 1 or 2, it is characterized in that：Described control unit
It is connected respectively with operating element, display unit.
4. the active concealed earphone detector of auto-excitation type according to claim 1 or 2, it is characterized in that：Described audio-electromagnetically
Ripple emission element is superimposed the coil antenna constituted by one or more coils, and described audio-frequency electric magnetic wave receiving part is line
Coil antenna or inductance.
5. the active concealed earphone detector of auto-excitation type according to claim 3, it is characterized in that：Described audio-frequency electric magnetic wave hair
Penetrate part and be superimposed the coil antenna constituted by one or more coils, described audio-frequency electric magnetic wave receiving part is coil type
Antenna or inductance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621303108 | 2016-11-30 | ||
| CN2016213031089 | 2016-11-30 |
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| Publication Number | Publication Date |
|---|---|
| CN206531976U true CN206531976U (en) | 2017-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720227256.5U Expired - Fee Related CN206531976U (en) | 2016-11-30 | 2017-03-09 | The active concealed earphone detector of auto-excitation type |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627876A (en) * | 2018-07-18 | 2018-10-09 | 张伟 | Cheat at one's exam the Distributed Detection localization method and detection device of wireless invisible earpiece |
| CN109091755A (en) * | 2018-09-21 | 2018-12-28 | 上海华聆人工耳医疗科技有限公司 | A kind of artificial cochlea's special-purpose radio-frequency signal supervisory instrument and method |
-
2017
- 2017-03-09 CN CN201720227256.5U patent/CN206531976U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627876A (en) * | 2018-07-18 | 2018-10-09 | 张伟 | Cheat at one's exam the Distributed Detection localization method and detection device of wireless invisible earpiece |
| CN109091755A (en) * | 2018-09-21 | 2018-12-28 | 上海华聆人工耳医疗科技有限公司 | A kind of artificial cochlea's special-purpose radio-frequency signal supervisory instrument and method |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| 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: 20170929 |