CN201210178Y - Wireless earphone detector - Google Patents
Wireless earphone detector Download PDFInfo
- Publication number
- CN201210178Y CN201210178Y CNU2008200776525U CN200820077652U CN201210178Y CN 201210178 Y CN201210178 Y CN 201210178Y CN U2008200776525 U CNU2008200776525 U CN U2008200776525U CN 200820077652 U CN200820077652 U CN 200820077652U CN 201210178 Y CN201210178 Y CN 201210178Y
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- static magnetic
- probe
- detector
- circuit
- magnetic field
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Abstract
The utility model relates to a wireless earphone detection device, and in particular relates to a wireless earphone detector based on the dynamic-static magnetic-field dual-detector, and resolves the problems of the prior wireless earphone detector that the positioning is not correct and the detection time is restricted, and comprises a detector and a main control circuit, wherein, the detector head comprises a static magnetic-field detector and an audio dynamic magnetic-field detector; the main control circuit comprises a single chip, an interface circuit, an audio power amplification circuit with the output terminal being connected with an earphone plug hole/a speaker, a static magnetic-field amplitude displaying body, a status indication lamp and a control key; the input terminal of the audio power amplification circuit is connected with the interface circuit; the control terminal of the audio power amplification circuit is connected with the single chip; the static magnetic-field amplitude displaying body, the control key and the status indication lamp are arranged on a shell; the detector is connected with the single chip through the interface circuit. The detection device has reasonable structure, good reliability, high sensibility and convenient application, and can improve the fairness of the examination, and is easy to be popularized, and has promising application prospect.
Description
Technical field
The utility model relates to a kind of wireless headset detecting devices, is a kind of wireless headset detector based on the two probes in dynamic and static magnetic field.
Background technology
In recent years, in various examinations such as English Test (Band 4 and 6), various cheating instruments and means constantly occur, grievous injury the examination justice, fairness.Especially at present comparatively popular wireless headset cheating, less because of its device, carry hiddenly, and earphone gos deep into duct and is difficult for being examined discovery, greatly increased the personnel's that invigilate inspection difficulty.How wireless headset is effectively monitored, become current invigilator mechanism problem demanding prompt solution.Wireless headset detector in the market belongs to the detection to audio frequency magnetic field mostly, promptly during mobile phone communication, survey the audio frequency magnetic field that it gives off by drive unit, this audio frequency magnetic field belongs to moving field, detects easily, but is difficult to exactly to source location takes place; Simultaneously, this moving field only just may detect in the time period that sends answer, so increased the difficulty that detects again.
Summary of the invention
The utility model exists in order to solve existing wireless headset detector: problem such as can't accurately locate, detection time is restricted, propose a kind of wireless headset detectors that adopt the two probes in dynamic and static magnetic field.
The utility model adopts following technical scheme to realize: the wireless headset detector, comprise probe, what be connected with the probe output terminal places main control circuit in the housing, described probe comprises static magnetic field probe and audio frequency moving field probe, main control circuit comprises single-chip microcomputer, energy is the interface circuit of identification probe type automatically, output terminal is connected with the audio power amplifying circuit of earphone jack/loudspeaker, the static magnetic field amplitude display body and the status indicator lamp that are connected with the single-chip microcomputer output terminal, the control button that links to each other with the Single-chip Controlling signal end, the input end of audio power amplifying circuit is connected with interface circuit, the control end of audio power amplifying circuit links to each other with single-chip microcomputer, static magnetic field amplitude display body, the control button, status indicator lamp is arranged on the housing, and probe is connected with single-chip microcomputer through interface circuit.Described probe and main control circuit split are provided with, and interface circuit adopts single USB interface, connect static magnetic field probe and audio frequency moving field probe respectively by this USB interface, realize the absence of audio signal, have the wireless headset under two kinds of situations of sound signal to survey.
During use, probe is connected with the USB interface of interface circuit, judge the probe type via interface circuit, as being audio frequency moving field probe, audio frequency moving field probe will detect the audio frequency field signal in the conversation in 3 meters, after the interface circuit transmission, under audio power amplifying circuit drives, can listen to by earpiece/speaker; As being the static magnetic field probe, the static magnetic field probe can detect the existence of permanent magnet in the earphone (being wireless headset) in 0.5 meter, and the magnetic field intensity signal of permanent magnet transferred to single-chip microcomputer through interface circuit, show detected magnetic field intensity by Micro Controller Unit (MCU) driving static magnetic field amplitude display body, this magnetic field intensity is relevant with the distance of distance objective thing, promptly can judge the position of wireless headset according to detected magnetic field intensity.Described static magnetic field probe adopts the highly sensitive static magnetic field probe of instrument grade, be other two-dimentional magnetic-sensitive elements of instrument and meter level, can differentiate the static magnetic field of mGS level, the Surface field intensity of the earphone of generally practising fraud is 3000GS, and is also very responsive to magnetic field of the earth (area, Taiyuan is about 400mGS).Therefore, aspect software, need adopt magnetic vector analysis and separation algorithm, to get rid of the influence in magnetic field of the earth.Described audio frequency moving field probe and instrument grade high sensitivity static magnetic field probe are existing products, can buy.
The control end of audio power amplifying circuit links to each other with single-chip microcomputer through volume control circuit, like this, can regulate the volume of earpiece/speaker when monitoring detectable signal.
Compared with prior art, the utility model adopts two kinds of probes: static magnetic field probe, audio frequency moving field are popped one's head in to the absence of audio signal, are had the wireless headset under two kinds of situations of sound signal to survey, promptly one biases toward the audio frequency field signal of surveying in the conversation, can detect within three meters; Another the biases toward detection earphone in the ear when conversing, realized when absence of audio signal (promptly during not conversing), detecting the purpose of wireless headset, compare the detection no time limit with traditional detection method, and detection accuracy height, location are accurate; Because the utility model adopts two types probe, so connect the interface circuit of probe and single-chip microcomputer must be under the control of single-chip microcomputer identification probe type automatically, have the interface circuit of this function and audio power amplifying circuit, volume control circuit is easy to realize for those skilled in the art, and has multiple circuit distortion, therefore, in instructions, do not specifically describe, a physical circuit schematic diagram (as shown in Figure 2) that can realize only is provided.
The utility model is rational in infrastructure, simple, and good reliability is highly sensitive, and is easy to use, improves the examination equitable degree, is easy to use and popularizes, and is with a wide range of applications.
Description of drawings
Fig. 1 is a frame principle figure of the present utility model;
Fig. 2 is a physical circuit schematic diagram of the present utility model;
Embodiment
The wireless headset detector, comprise probe, what be connected with the probe output terminal places main control circuit in the housing, described probe comprises static magnetic field probe and audio frequency moving field probe, main control circuit comprises single-chip microcomputer, energy is the interface circuit of identification probe type automatically, output terminal is connected with the audio power amplifying circuit of earphone jack/loudspeaker, the static magnetic field amplitude display body and the status indicator lamp that are connected with the single-chip microcomputer output terminal, the control button that links to each other with the Single-chip Controlling signal end, the input end of audio power amplifying circuit is connected with interface circuit, the control end of audio power amplifying circuit links to each other with single-chip microcomputer, static magnetic field amplitude display body, the control button, status indicator lamp is arranged on the housing, and probe is connected with single-chip microcomputer through interface circuit.Described probe and main control circuit split are provided with, and interface circuit adopts single USB interface.The control end of audio power amplifying circuit links to each other with single-chip microcomputer through volume control circuit.
During concrete enforcement, described static magnetic field amplitude display body adopts static magnetic field amplitude display tube group, the display tube group is existing known products, light emitting diode by a plurality of one-tenth row, column dischargings constitutes, its luminous number is by Single-chip Controlling, what of luminous number are corresponding with detected magnitude of field intensity, and the static magnetic field amplitude display tube group that this detector adopts two groups of quadratures to be provided with is to demonstrate the position of detecting target more exactly; The control button comprises power key, volume adjusting key, mode of operation options button (for example separating alert, peak value) etc.; Status indicator lamp comprises that power light, static magnetic field detect pilot lamp, moving field detects pilot lamp, peak value pilot lamp etc., in order to indicate this detector operation state and pattern.
Claims (4)
1, a kind of wireless headset detector, comprise probe, what be connected with the probe output terminal places main control circuit in the housing, it is characterized in that: described probe comprises static magnetic field probe and audio frequency moving field probe, main control circuit comprises single-chip microcomputer, energy is the interface circuit of identification probe type automatically, output terminal is connected with the audio power amplifying circuit of earphone jack/loudspeaker, the static magnetic field amplitude display body and the status indicator lamp that are connected with the single-chip microcomputer output terminal, the control button that links to each other with the Single-chip Controlling signal end, the input end of audio power amplifying circuit is connected with interface circuit, the control end of audio power amplifying circuit links to each other with single-chip microcomputer, static magnetic field amplitude display body, the control button, status indicator lamp is arranged on the housing, and probe is connected with single-chip microcomputer through interface circuit.
2, wireless headset detector according to claim 1, it is characterized in that: the control end of audio power amplifying circuit links to each other with single-chip microcomputer through volume control circuit.
3, wireless headset detector according to claim 1 is characterized in that: described probe and main control circuit split are provided with, and interface circuit adopts single USB interface.
4, wireless headset detector according to claim 1 is characterized in that: the static magnetic field amplitude display tube group that described static magnetic field amplitude display body adopts two groups of quadratures to be provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200776525U CN201210178Y (en) | 2008-06-21 | 2008-06-21 | Wireless earphone detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200776525U CN201210178Y (en) | 2008-06-21 | 2008-06-21 | Wireless earphone detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201210178Y true CN201210178Y (en) | 2009-03-18 |
Family
ID=40480917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200776525U Expired - Fee Related CN201210178Y (en) | 2008-06-21 | 2008-06-21 | Wireless earphone detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201210178Y (en) |
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 |
| 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 |
| CN109188319A (en) * | 2018-10-18 | 2019-01-11 | 国网山东省电力公司潍坊供电公司 | A kind of hand-held alternating current-direct current detection of magnetic field instrument |
-
2008
- 2008-06-21 CN CNU2008200776525U patent/CN201210178Y/en not_active Expired - Fee Related
Cited By (4)
| 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 |
| 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 |
| CN109188319A (en) * | 2018-10-18 | 2019-01-11 | 国网山东省电力公司潍坊供电公司 | A kind of hand-held alternating current-direct current detection of magnetic field instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090318 Termination date: 20110621 |