CN206149277U - Multichannel adjustable gain photoelectric conversion device - Google Patents
Multichannel adjustable gain photoelectric conversion device Download PDFInfo
- Publication number
- CN206149277U CN206149277U CN201621067882.4U CN201621067882U CN206149277U CN 206149277 U CN206149277 U CN 206149277U CN 201621067882 U CN201621067882 U CN 201621067882U CN 206149277 U CN206149277 U CN 206149277U
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- China
- Prior art keywords
- circuit
- gain
- conversion device
- photoelectric conversion
- switching circuit
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- 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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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Amplifiers (AREA)
Abstract
The utility model discloses a multichannel adjustable gain photoelectric conversion device, including basic photoelectric switching circuit, gain adjustment circuit, basic photoelectric switching circuit passes through data flat cable with the gain adjustment circuit and is connected, basic photoelectric switching circuit includes photodiode, preamplifier, main air port amplifier and digital potentiometer, the gain adjustment circuit includes MCU, communication interface, display circuit, keying circuit, basic photoelectric switching circuit encapsulates in a shell, and is provided with the external connection interface on the shell. The utility model discloses to different defence areas, different environment's perimeter security protection system all can be nimble regulation port number and gain, be suitable for various places.
Description
Technical field
This utility model is related to optical fiber perimeter safety-security area, more particularly to a kind of multichannel adjustable gain opto-electronic conversion dress
Put.
Background technology
In recent years, security product is developed rapidly in industry-by-industry, and optical fiber perimeter security protection is current safety-security area ratio
Compared with the technology in forward position.Optical fiber perimeter security protection has the features such as reliability is high, rate of false alarm is low, crypticity is good, in various civilian, works
Industry, military applications can apply.With the difference of occasion, defence area Shuo Congdan defence areas to 16 defence areas, 32 defence areas, even more prevent more
Area, with practical situation to corresponding, each defence area is furnished with transmission cable, front-end module, sensor cable, terminal module to defence area number, each
Defence area needs light source all the way and light echo all the way, and light source to be a light source separated by shunt, lead to one per road light echo
The opto-electronic conversion in road.The light source size that separated due to every road shunt, module is lost, transmission cable loss, sensor cable loss etc. are each
Differ, cause each defence area light echo size, sensitivity to have differences, current opto-electronic conversion is difficult according to unified gain will be each
Individual defence area sensitivity adjustment is in same level so that the advantage of optical fiber perimeter security protection is not preferably played, a new generation
Perimeter security system is badly in need of technical breakthrough.
The content of the invention
In view of the shortcomings of the prior art, the purpose of this utility model is that there is provided a kind of multichannel adjustable gain
Photoelectric conversion device, solves defence area number disunity, the skimble-scamble problem of sensitivity, is the stability of optical fiber perimeter safety-protection system
There is provided guarantee.
To achieve these goals, the technical solution adopted in the utility model is such:A kind of multichannel adjustable gain
Photoelectric conversion device, including basic photoelectric switching circuit, gain adjusting circuit, the basic photoelectric switching circuit and gain-adjusted
Circuit is connected by data flat cable;The basic photoelectric switching circuit includes photodiode, preamplifier, post-amplifier
And digital regulation resistance, the gain adjusting circuit includes MCU, communication interface, display circuit, key circuit;The basic photoelectricity
Change-over circuit is encapsulated in a shell, and external connection interface section is provided with shell.
Used as a kind of preferred version, the photodiode is electrically accessed preamplifier from photovoltaic mode.
Used as a kind of preferred version, the pregain is more than 113.9dB, input bias current 1pA.
Used as a kind of preferred version, the post-amplifier is two-stage voltage amplifier.
Used as a kind of preferred version, the external connection interface section includes signal output, power port, winding displacement interface.
Used as a kind of preferred version, the shell is aluminum hull.
Compared with prior art, the beneficial effects of the utility model:This utility model is for different defence areas, varying environment
Perimeter security system can flexibly adjust port number and gain, be suitable for various places.
Description of the drawings
Fig. 1 is circuit connection diagram of the present utility model.
Specific embodiment
This utility model is further described with reference to specific embodiment.Following examples are only used for clearly
The technical solution of the utility model is illustrated, and protection domain of the present utility model can not be limited with this.
Embodiment:
As shown in figure 1, a kind of multichannel adjustable gain photoelectric conversion device, including basic photoelectric switching circuit, gain tune
Economize on electricity road, the basic photoelectric switching circuit are connected by data flat cable with gain adjusting circuit;The basic opto-electronic conversion electricity
Road includes photodiode, preamplifier, post-amplifier and digital regulation resistance, and the gain adjusting circuit includes MCU, leads to
Letter interface, display circuit, key circuit;The basic photoelectric switching circuit is encapsulated in a shell, and is provided with shell outer
Portion's connecting interface;Wherein described basic photoelectric switching circuit is standalone module, is connected with mother matrix by board to board connector, passage
Number is flexibly adjustable;The gain adjusting circuit has power down storage, and PC communication functions, and gain-adjusted both can be adjusted by button
Section, also can be adjusted by PC host computers, facilitate remote adjustment;The MCU includes piece choosing, sliding end with the control of digital regulation resistance
The storage of mobile, sliding end, sliding end reset, and the standard gain of opto-electronic conversion is 160dB, and adjustable gain scope 140dB ~
180dB, with a width of 30kHz(@-0.3dB), background noise is less than 100mv.
This utility model preferably photodiode is electrically accessed preamplifier from photovoltaic mode, and optical responsivity is more than
0.85A/W(@λ=1310nm).
This utility model preferably pregain is more than 113.9dB, input bias current 1pA.
This utility model preferably post-amplifier is two-stage voltage amplifier, using common mode inhibition working method, is had
There is filtering decrease of noise functions.
This utility model preferably external connection interface section includes signal output, power port, winding displacement interface.
When being embodied as, also including power module, the power module is powered to whole circuit;The preferred institute of this utility model
Shell is stated for aluminum hull, light echo 1,2, n represents the light echo in each defence area, and light echo 1 represents defence area 1, by that analogy;Two pole of the photoelectricity
Heliogram is converted to current signal by pipe, and current signal is converted to voltage signal by preamplifier, while filtering straight
The signal of stream part, preamplifier conversion after ac voltage signal through post-amplifier filtering, noise reduction, amplify it
Afterwards, exported by signal output interface;Control button circuit, passes to MCU, and MCU is carried out by way of controlling digital regulation resistance
Gain-adjusted is controlled, and the LCDs that the real time position of digital regulation resistance passes to display circuit are shown by MCU, if necessary,
Can be with MCU, and then control digital regulation resistance be controlled using PC ends host computer by communication interface, MCU will by communication interface
The real time position of digital regulation resistance is sent to PC ends host computer and shows;Gain adjusting circuit is with basic photoelectric switching circuit by number
Connect according to winding displacement, the winding displacement also assume responsibility for the supply lines of gain adjusting circuit;The basic photoelectric switching circuit is standalone module,
It is connected with mother matrix by board to board connector, board to board connector works as base using the 20P paster Simple oxhorn seats of spacing 1.27MM
When this photoelectric switching circuit plugs mother matrix, circuit can send a trigger to MCU, and MCU unlocks the control to the module, examines
Considering signal output voltage needs a rational scope, outfan to add two Zener diodes, and selection breakdown reverse voltage is
The Zener diode of 10V/-10V.
The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from this utility model know-why, some improvement and deformation can also be made, these change
Enter and deform also to should be regarded as protection domain of the present utility model.
Claims (6)
1. a kind of multichannel adjustable gain photoelectric conversion device, it is characterised in that:Including basic photoelectric switching circuit, gain-adjusted
Circuit, the basic photoelectric switching circuit are connected by data flat cable with gain adjusting circuit;The basic photoelectric switching circuit
Including photodiode, preamplifier, post-amplifier and digital regulation resistance, the gain adjusting circuit includes MCU, communication
Interface, display circuit, key circuit;The basic photoelectric switching circuit is encapsulated in a shell, and outside is provided with shell
Connecting interface.
2. a kind of multichannel adjustable gain photoelectric conversion device according to claim 1, it is characterised in that:The photoelectricity two
Pole pipe is electrically accessed preamplifier from photovoltaic mode.
3. a kind of multichannel adjustable gain photoelectric conversion device according to claim 1, it is characterised in that:Put before described
The gain of big device is more than 113.9dB, input bias current 1pA.
4. a kind of multichannel adjustable gain photoelectric conversion device according to claim 1, it is characterised in that:The rear class is put
Big device is two-stage voltage amplifier.
5. a kind of multichannel adjustable gain photoelectric conversion device according to claim 1, it is characterised in that:The outside connects
Connection interface includes signal output, power port, winding displacement interface.
6. a kind of multichannel adjustable gain photoelectric conversion device according to claim 1, it is characterised in that:The shell is
Aluminum hull.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201621067882.4U CN206149277U (en) | 2016-09-21 | 2016-09-21 | Multichannel adjustable gain photoelectric conversion device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201621067882.4U CN206149277U (en) | 2016-09-21 | 2016-09-21 | Multichannel adjustable gain photoelectric conversion device |
Publications (1)
Publication Number | Publication Date |
---|---|
CN206149277U true CN206149277U (en) | 2017-05-03 |
Family
ID=58619706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201621067882.4U Expired - Fee Related CN206149277U (en) | 2016-09-21 | 2016-09-21 | Multichannel adjustable gain photoelectric conversion device |
Country Status (1)
Country | Link |
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CN (1) | CN206149277U (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107819517A (en) * | 2017-12-04 | 2018-03-20 | 岭南师范学院 | A kind of optic fiber converter and its control method |
CN108833021A (en) * | 2018-05-29 | 2018-11-16 | 青岛海信宽带多媒体技术有限公司 | A kind of processing method of burst optical signal, system, circuit and optical module |
CN111596183A (en) * | 2020-06-11 | 2020-08-28 | 合肥工业大学 | Multichannel gain controllable photoelectric detection system and method thereof |
-
2016
- 2016-09-21 CN CN201621067882.4U patent/CN206149277U/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107819517A (en) * | 2017-12-04 | 2018-03-20 | 岭南师范学院 | A kind of optic fiber converter and its control method |
CN108833021A (en) * | 2018-05-29 | 2018-11-16 | 青岛海信宽带多媒体技术有限公司 | A kind of processing method of burst optical signal, system, circuit and optical module |
CN111596183A (en) * | 2020-06-11 | 2020-08-28 | 合肥工业大学 | Multichannel gain controllable photoelectric detection system and method thereof |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
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: 20170503 Termination date: 20170921 |