CN203037345U - Laser sound detection apparatus - Google Patents
Laser sound detection apparatus Download PDFInfo
- Publication number
- CN203037345U CN203037345U CN 201220696759 CN201220696759U CN203037345U CN 203037345 U CN203037345 U CN 203037345U CN 201220696759 CN201220696759 CN 201220696759 CN 201220696759 U CN201220696759 U CN 201220696759U CN 203037345 U CN203037345 U CN 203037345U
- Authority
- CN
- China
- Prior art keywords
- laser
- detection apparatus
- sound
- power amplifier
- glass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a laser sound detection apparatus comprising a laser emitter and a laser receiver, wherein the laser receiver comprises a photocell, a signal amplification circuit, a filter circuit and an power amplifier circuit successively connected with each other; and the power amplifier circuit is connected with a loudspeaker. The beneficial effects of the detection apparatus are that by utilizing a phenomena that speaking can lead to glass vibration, people' speaking sound in a room is monitored by detecting laser reflected from the glass, remote monitoring the speaking sound is realized; compared with conventional eavesdropping methods, the detection apparatus is small, convenient for hiding and isn't easy to discover.
Description
Technical field
The utility model belongs to the thermometrically technical field, relates to a kind of laser sound-detection device.
Background technology
General sound monitoring technology, mainly be on eavesdropping target's the body or near the placement wiretap, perhaps use direct sound to gather telescope, two kinds of above method major defects are that audiomonitor is found by the eavesdropping target easily, causing the action failure.
Summary of the invention
The purpose of this utility model provides a kind of laser sound-detection device, has solved the problem that audiomonitor of the prior art is found by the eavesdropping target easily.
The technical scheme that the utility model adopts is, a kind of laser sound-detection device, comprise generating laser and laser pickoff, laser pickoff comprises that photoelectric cell, signal amplification circuit, filtering circuit, power amplifier are connected in sequence, and power amplifier is connected with loudspeaker.
The beneficial effects of the utility model are: utilize the vibrations that can cause glass in a minute, monitor people's one's voice in speech in the room by detecting the laser that reflects on glass, realize the remote sound of monitoring in the room of speaking, have small-sized with respect to traditional interception method, convenient hidden, be not easy to be found.
Description of drawings
Fig. 1 is the structural representation of laser sound-detection device of the present utility model.
Among the figure, 1. generating laser, 2. laser pickoff, 3. photoelectric cell, 4. signal amplification circuit, 5. filtering circuit, 6. power amplifier, 7. loudspeaker.
Embodiment
Because the people can cause the vibrations of surrounding air when speaking, can cause the vibrations of room window-glass, utilize to cause that in a minute the vibrations of glass monitor one's voice in speech in the room, just can realize the monitoring to sound.
As shown in Figure 1, the structure of laser sound-detection device of the present utility model is, comprise generating laser 1 and laser pickoff 2, generating laser 1 is used for beating in the room at eavesdropping target place on glass, laser pickoff 2 is used for receiving the laser signal from this room reflected back on glass, laser pickoff 2 comprises that photoelectric cell 3, signal amplification circuit 4, filtering circuit 5, power amplifier 6 are connected in sequence, and power amplifier 6 is connected with loudspeaker 7.
The principle of work of the utility model laser sound-detection device is, the people is in the indoor vibrations that can cause air in the room in a minute, thereby causes the slight vibrations of glass; Beam of laser is beaten on glass, utilize 3 pairs of laser signals that reflect of photoelectric cell to receive and change, by signal amplification circuit 4 signal that receives is amplified again, then utilize filtering circuit 5 with noise filtering, at last, use power amplifier 6 and loudspeaker 7 that voice is restored, just can know the content that to monitor.
Claims (1)
1. laser sound-detection device, it is characterized in that: comprise generating laser (1) and laser pickoff (2), laser pickoff (2) comprises that photoelectric cell (3), signal amplification circuit (4), filtering circuit (5), power amplifier (6) are connected in sequence, and power amplifier (6) is connected with loudspeaker (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220696759 CN203037345U (en) | 2012-12-17 | 2012-12-17 | Laser sound detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220696759 CN203037345U (en) | 2012-12-17 | 2012-12-17 | Laser sound detection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203037345U true CN203037345U (en) | 2013-07-03 |
Family
ID=48689456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220696759 Expired - Fee Related CN203037345U (en) | 2012-12-17 | 2012-12-17 | Laser sound detection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203037345U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557928A (en) * | 2013-10-23 | 2014-02-05 | 国家电网公司 | Sound detection equipment based on laser diffraction principle |
| CN104034408A (en) * | 2014-06-13 | 2014-09-10 | 南京理工大学 | Laser interception device based on correlation detection technology |
| CN104460684A (en) * | 2014-11-17 | 2015-03-25 | 长春理工大学 | Flying robot for remote sound signal acquisition |
| CN105807288A (en) * | 2016-04-06 | 2016-07-27 | 工业和信息化部电子工业标准化研究院 | Laser monitoring device and system of monitoring equipment |
-
2012
- 2012-12-17 CN CN 201220696759 patent/CN203037345U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557928A (en) * | 2013-10-23 | 2014-02-05 | 国家电网公司 | Sound detection equipment based on laser diffraction principle |
| CN103557928B (en) * | 2013-10-23 | 2015-09-16 | 国家电网公司 | Based on the sound detection equipment of laser light diffraction principle |
| CN104034408A (en) * | 2014-06-13 | 2014-09-10 | 南京理工大学 | Laser interception device based on correlation detection technology |
| CN104460684A (en) * | 2014-11-17 | 2015-03-25 | 长春理工大学 | Flying robot for remote sound signal acquisition |
| CN105807288A (en) * | 2016-04-06 | 2016-07-27 | 工业和信息化部电子工业标准化研究院 | Laser monitoring device and system of monitoring equipment |
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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: 20130703 Termination date: 20131217 |