CN105807288B - A kind of the laser monitoring device and system of audiomonitor - Google Patents
A kind of the laser monitoring device and system of audiomonitor Download PDFInfo
- Publication number
- CN105807288B CN105807288B CN201610211292.2A CN201610211292A CN105807288B CN 105807288 B CN105807288 B CN 105807288B CN 201610211292 A CN201610211292 A CN 201610211292A CN 105807288 B CN105807288 B CN 105807288B
- Authority
- CN
- China
- Prior art keywords
- laser
- infrared
- eavesdropping
- connect
- emitter
- 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.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
Abstract
The invention discloses the laser monitoring device and system of a kind of audiomonitor, including semiconductor laser transmitter, laser eavesdropping emitter, laser beam expanding optical system, transmitting laser system, closed box, adopts acoustic device, common infrared eavesdropping emitter, laser detector, noise reduction process system, audio output, voice modulation amplifier, preamplifier, infrared remote receiver, infrared modulated and send system and amplification noise processor.The beneficial effects of the present invention are: the present apparatus combines advantage of advantage and laser eavesdropping of the contact Eavesdropping under the more complex environment of short distance under remote noncontact condition, according to different condition between two kinds of eavesdropping modes free switching.The present apparatus is comprehensive to use common infrared and laser infrared as transmission medium, reach 1 kilometer to make to eavesdrop distance, and adapt to contact and non-contact two kinds of situations, there is very strong practicability, internal system structure stable connection is suitble to the use of criminal investigation and equipment of solving a case.
Description
Technical field
The present invention relates to a kind of laser eavesdropping devices, and in particular to a kind of the laser monitoring device and system of audiomonitor,
Belong to acousto-optics technical field.
Background technique
There are many forms of monitoring, from initial installation profession audiomonitor, establishes pseudo-base station till now for wireless hand
Machine is monitored, and experienced very long process.Nowadays the use of monitoring technique is fairly common, in war, to learn enemy
The content got in touch between each other often connects electric wire and listens in enterprising commit theft of enemy's communication line, to grasp the initiative of war.Now
Cracking of cases in, Security Officer is placed on Minisize wireless microphone in the place that suspect often haunts, monitor their conversation contents,
Grasp conclusive evidence.It is quite hidden to monitor requirement, is not easy to be found, so needing using various cleverly methods and technology.
It is monitored using laser technology, can hear the acoustic information in room heavily guarded, people can not approach.Photodetector
It is many kinds of, common are selenium, germanium, silicon, GaAs etc..The glass of a branch of invisible Laser emission to the room can be used
On window, since sound can cause the microvibration of windowpane, change so as to cause reflected laser spot positions.Mesh
Preceding some audiomonitors, which come with some shortcomings to be frequently necessary to contact when place is monitored, just can be carried out monitoring work, the use of monitoring
Range is smaller, and working efficiency is low.
Summary of the invention
The object of the invention is that provide to solve the above-mentioned problems a kind of audiomonitor laser monitoring device and
System.
The present invention is achieved through the following technical solutions the laser monitoring device and system of a kind of audiomonitor of above-mentioned purpose,
Including semiconductor laser transmitter, laser eavesdropping emitter, laser beam expanding optical system, transmitting laser system, closed box,
Adopt acoustic device, common infrared eavesdropping emitter, laser detector, noise reduction process system, audio output, voice modulation amplification
Device, preamplifier, infrared remote receiver, infrared modulated send system and amplification noise processor；The laser eavesdropping transmitting dress
It sets and is internally provided with semiconductor laser transmitter, laser beam expanding optical system and transmitting laser system, the laser eavesdropping transmitting
Device is connect with closed box by optical signal, and the closed box is connect with acoustic device is adopted, described to adopt acoustic device and be set to
Amplification noise processor connection inside common infrared eavesdropping emitter, the amplification noise processor and infrared modulated are sent
System connection, the common infrared eavesdropping emitter are connect with infrared remote receiver, the infrared remote receiver and preamplifier
Signal connection, the preamplifier are connect with laser detector, and the laser detector and the closed enclosure sub-light signal
Connection, the preamplifier are connect with voice modulation amplifier, and the voice modulation amplifier is connect with audio output, institute
It states and is connected with noise reduction process system between voice modulation amplifier and the audio output.
Preferably, the semiconductor laser transmitter is connected with the laser beam expanding optical system, the laser beam expanding light
System is connected with transmitting laser system.
Preferably, the audio output, the voice modulation amplifier, the preamplifier and the infrared receiver
Device constitutes reception device.
Preferably, the infrared modulated sends the inside that system is located at the common infrared wiretap.
Preferably, the transmitting laser system issues continuous 5mW near infrared light, and wave-length coverage is about in 790-820nm.
Preferably, the laser detector investigative range is between 400-1100nm.
The beneficial effects of the present invention are: this equipment complex contact Eavesdropping is excellent under the more complex environment of short distance
The advantage of gesture and laser eavesdropping under remote noncontact condition, according to different condition between two kinds of eavesdropping modes free switching.
This equipment complex, as transmission medium, so that eavesdropping distance be made to reach 1 kilometer, and is adapted to using common infrared and laser infrared
Contact and non-contact two kinds of situations have very strong practicability, which has service life long, easy to operate, monitor effect
Good, disposable charging can be used for a long time, and have the function of that store voice information is recorded, suitable for use of investigating and solve a case,
Use scope is wider.Silicon photodetector is selected in the present apparatus, advantage: performance is stablized, and spectral region is wide, and frequency characteristic is good,
High conversion efficiency is resistant to hyperthermia radiation etc..
Detailed description of the invention
Fig. 1 is structural module diagram of the invention；
Fig. 2 is the working principle of the invention module map；
In figure: 1, semiconductor laser transmitter；2, laser eavesdropping emitter；3, laser beam expanding optical system；4, emit
Laser system；5, closed box；6, acoustic device is adopted；7, common infrared eavesdropping emitter；8, laser detector；9, noise reduction process
System；10, audio output；11, voice modulation amplifier；12, preamplifier；13, infrared remote receiver；14, infrared modulated
Transmission system；15, amplify noise processor.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The laser monitoring device and system of a kind of audiomonitor referring to FIG. 1-2, including semiconductor laser transmitter 1, swash
Light eavesdropping emitter 2, transmitting laser system 4, closed box 5, adopts acoustic device 6, is common infrared at laser beam expanding optical system 3
Eavesdrop emitter 7, laser detector 8, noise reduction process system 9, audio output 10, voice modulation amplifier 11, preceding storing
Big device 12, infrared remote receiver 13, infrared modulated send system 14 and amplification noise processor 15；The laser eavesdropping emitter
2 are internally provided with semiconductor laser transmitter 1, laser beam expanding optical system 3 and transmitting laser system 4, the laser eavesdropping hair
Injection device 2 is connect with closed box 5 by optical signal, and the closed box 5 is connect with acoustic device 6 is adopted, it is described adopt acoustic device 6 with
The amplification noise processor 15 inside common infrared eavesdropping emitter 7 is set to connect, the amplification noise processor 15 and
Infrared modulated sends system 14 and connects, and the common infrared eavesdropping emitter 7 is connect with infrared remote receiver 13, described infrared to connect
It receives device 13 to connect with 12 signal of preamplifier, the preamplifier 12 is connect with laser detector 8, and the laser acquisition
Device 8 is connect with closed 5 optical signal of box, and the preamplifier 12 is connect with voice modulation amplifier 11, the audio
Modulated amplifier 11 is connect with audio output 10, is connected between the voice modulation amplifier 11 and the audio output 10
There is noise reduction process system 9.
As a kind of technical optimization scheme of the invention: the semiconductor laser transmitter 1 and the laser beam expanding optics
System 3 connects, and the laser beam expanding optical system 3 and transmitting laser system 4 connect, and the semiconductor laser transmitter can be straight
It connects and sends a signal to laser beam expanding optical system, work efficiency is high.
As a kind of technical optimization scheme of the invention: the audio output 10, the voice modulation amplifier 11, institute
It states preamplifier 12 and the infrared remote receiver 13 constitutes reception device, the signal model for enabling to reception device to receive
It encloses wide.
As a kind of technical optimization scheme of the invention: the infrared modulated sends system 14 and is located at described common infrared steal
The inside of device for tone frequencies 7, infrared modulated send system and directly can be modulated and send to infrared ray.
As a kind of technical optimization scheme of the invention: the transmitting laser system 4 issues continuous 5mW near infrared light,
Wave-length coverage is about in 790-820nm.The power of 5mW be in laser eavesdropping it is enough, working range can achieve lkm.
As a kind of technical optimization scheme of the invention: 8 investigative range of laser detector is between 400-1100nm.
The wavelength of near infrared light just meets the requirement of the peak response wavelength of silicon photoelectric diode, makes pick-up probe work larger
In responsiveness.Infrared light is black light, it is not easy to which monitored object is discovered；Infrared light has good propagation in atmosphere special
Property, it can not almost consider atmospheric scattering；This laser is easy to carry, is easy to carry out practical operation；Relative to larger wavelength
Infrared light for, near-infrared is not easy thermal radiation bring influence of noise；The receiving sensor of near infrared light does not need special
Cooling equipment, so that it may work in optimum sensitivity.
In the use of the present invention, the characteristics of device is using laser and infrared directionality and monochromaticjty, is supervised using laser
Listen system.When system works, laser generator generates a branch of superfine laser, and is transmitted to the glass for being ravesdropping room
On, when someone talks in room, because being influenced by indoor sound variation slight vibration occurs for glass, and in glass surface
Generate acoustic pressure, the size and particle of acoustic pressure are related with location, and the reaction of glass surface with act directly on above
Local acoustical be pressed into direct ratio, therefore glass can be deformed, so that laser incidence angle in the case where incident direction is constant obtains
Variation.It can learn that the optical power of reflected light also changes therewith by the reflection law of light, the law of refraction and fresnel formula.
People are received on outdoor certain position with laser pickoff, and by filtering and amplification, be can be achieved with people in monitor room and said
The function of words.Voice can directly be saved as digital document by the equipment, can also be exported by 3.5 audio interface.
The present apparatus is broadly divided into emitter, signal processing apparatus, reception device and voice data storage equipment, due to swashing
Light eavesdropping is identical with common infrared eavesdropping record principle, and only detecting head is different, therefore reception device can share.Laser eavesdropping portion
The emitter divided is made of semiconductor laser transmitter and optical system.The emitter of common infrared eavesdropping part is by sound
Acquisition amplification and infrared modulated send system and constitute.For sound when issuing, sound source can generate vibration on glass
It is dynamic, the reflection of light can be caused to change, after RF transmitter emits laser, laser can be bumped against on glass, glass meeting
Subtle variation is generated, light can be become the inside for being transmitted to condenser by laser, and condenser can gather the projection that light changes
The surface of photoelectric converter, photoelectric converter can convert optical signals to weak electric signal, amplify by band amplifier, put
Band signal after big becomes acoustical signal, and acoustical signal can be transmitted to denoiser, and denoiser will do it noise reduction process, after noise reduction process
Acoustical signal can directly be played back by loudspeaker, the memory inside the equipment can become amplified voice signal
Digital signal file storage gets up, and the file after storage can carry out final process by computer.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (6)
1. a kind of laser monitoring device of audiomonitor, including semiconductor laser transmitter (1), laser eavesdropping emitter (2),
Laser beam expanding optical system (3), closed box (5), adopts acoustic device (6), common infrared eavesdropping transmitting at transmitting laser system (4)
It is device (7), laser detector (8), noise reduction process system (9), audio output (10), voice modulation amplifier (11), preposition
Amplifier (12), infrared remote receiver (13), infrared modulated send system (14) and amplification noise processor (15)；Its feature exists
In: the laser eavesdropping emitter (2) be internally provided with semiconductor laser transmitter (1), laser beam expanding optical system (3) and
Emit laser system (4), the laser eavesdropping emitter (2) is connect with closed box (5) by optical signal, the closed enclosure
Sub (5) are connect with acoustic device (6) is adopted, described to adopt acoustic device (6) and be set to putting for common infrared eavesdropping emitter (7) inside
Big noise processor (15) connection, the amplification noise processor (15) sends system (14) with infrared modulated and connect, described general
Aglow outer eavesdropping emitter (7) connect with infrared remote receiver (13), the infrared remote receiver (13) and preamplifier (12)
Signal connection, the preamplifier (12) connect with laser detector (8), and the laser detector (8) with it is described closed
The connection of box (5) optical signal, the preamplifier (12) connect with voice modulation amplifier (11), the voice modulation amplification
Device (11) is connect with audio output (10), is connected between the voice modulation amplifier (11) and the audio output (10)
There are noise reduction process system (9).
2. a kind of laser monitoring device of audiomonitor according to claim 1, it is characterised in that: the semiconductor laser
Transmitter (1) and the laser beam expanding optical system (3) connection, the laser beam expanding optical system (3) and transmitting laser system
(4) it connects.
3. a kind of laser monitoring device of audiomonitor according to claim 1, it is characterised in that: the audio output
(10), the voice modulation amplifier (11), the preamplifier (12) and the infrared remote receiver (13) constitute reception
Device.
4. a kind of laser monitoring device of audiomonitor according to claim 1, it is characterised in that: the infrared modulated hair
The inside for sending system (14) to be located at the common infrared wiretap (7).
5. a kind of laser monitoring device of audiomonitor according to claim 1, it is characterised in that: the transmitting laser system
System (4) issues continuous 5mW near infrared light, and wave-length coverage is about in 790-820nm.
6. a kind of laser monitoring device of audiomonitor according to claim 1, it is characterised in that: the laser detector
(8) investigative range is between 400-1100nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610211292.2A CN105807288B (en) | 2016-04-06 | 2016-04-06 | A kind of the laser monitoring device and system of audiomonitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610211292.2A CN105807288B (en) | 2016-04-06 | 2016-04-06 | A kind of the laser monitoring device and system of audiomonitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105807288A CN105807288A (en) | 2016-07-27 |
| CN105807288B true CN105807288B (en) | 2019-01-04 |
Family
ID=56459631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610211292.2A Active CN105807288B (en) | 2016-04-06 | 2016-04-06 | A kind of the laser monitoring device and system of audiomonitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105807288B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108471332A (en) * | 2018-03-17 | 2018-08-31 | 广东容祺智能科技有限公司 | A kind of remote monitoring system |
| CN108847091B (en) * | 2018-04-24 | 2020-08-28 | 山东大学 | Instrument and meter and automatic comprehensive experiment device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2158553Y (en) * | 1993-07-08 | 1994-03-09 | 孙春生 | Infrared theft or intruder alarm |
| CN101568051A (en) * | 2009-06-08 | 2009-10-28 | 北京建筑工程学院 | Method and device for restoring acoustical signal by using laser |
| CN102938656B (en) * | 2012-11-07 | 2015-02-18 | 郑州正义电子科技有限公司 | Police monitoring device |
| CN203037345U (en) * | 2012-12-17 | 2013-07-03 | 西安理工大学 | Laser sound detection apparatus |
| CN103905116A (en) * | 2014-03-26 | 2014-07-02 | 太仓微芯电子科技有限公司 | Infrared LED wireless audio sending device, receiving device and transmitting system |
| CN104459698A (en) * | 2014-12-19 | 2015-03-25 | 江南大学 | Laser monitor detection device based on infrared scanning monitoring technology |
| CN205450275U (en) * | 2016-04-06 | 2016-08-10 | 工业和信息化部电子工业标准化研究院 | Laser monitoring apparatus of audiomonitor |
-
2016
- 2016-04-06 CN CN201610211292.2A patent/CN105807288B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105807288A (en) | 2016-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8054986B2 (en) | Method and apparatus for computer communication using audio signals | |
| CN108702571B (en) | Audio communication system and method | |
| CN105807288B (en) | A kind of the laser monitoring device and system of audiomonitor | |
| CN101656574A (en) | Portable wireless laser communication terminal machine | |
| CN205450275U (en) | Laser monitoring apparatus of audiomonitor | |
| CN101568051A (en) | Method and device for restoring acoustical signal by using laser | |
| US20210151059A1 (en) | Space division method and apparatus, and storage medium | |
| Ali et al. | Audio Streaming Using Li-FI Communication | |
| CN211406026U (en) | Monitoring system with ultraviolet laser communication function | |
| Huang et al. | Preliminary investigation of air-to-water visible light communication link under strong ambient light | |
| CN204203482U (en) | A kind of high sensitivity line finder | |
| CN104034408A (en) | Laser interception device based on correlation detection technology | |
| CN209416488U (en) | Double oscillator solid acoustic sensor devices | |
| CN108471332A (en) | A kind of remote monitoring system | |
| CN103995217A (en) | Novel line hunting instrument | |
| CN203881896U (en) | Novel line hunting instrument | |
| CN203406938U (en) | Infrared video camera integrating audio/video and alarm input/output into body | |
| CN104020494A (en) | Novel line hunting method | |
| CN110493356A (en) | A kind of two-way communication mailbox system | |
| CN112804025B (en) | Electromagnetic shielding room and communication system | |
| CN104052514A (en) | Novel signal receiving device of line finder | |
| CN212811712U (en) | System for laser monitoring by using non-diffraction light beam | |
| US6614024B1 (en) | Infra-red wireless receiver with novel shielding and IR front end signal enhancement | |
| Murdas et al. | Online healthcare monitor system based on optical wireless and FBG sensors | |
| CN107820161A (en) | One kind recording interferometer and its mixing Poewr control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |