CN204291154U - Airborne camera-shooting and recording device video signal processing module - Google Patents
Airborne camera-shooting and recording device video signal processing module Download PDFInfo
- Publication number
- CN204291154U CN204291154U CN201420864118.4U CN201420864118U CN204291154U CN 204291154 U CN204291154 U CN 204291154U CN 201420864118 U CN201420864118 U CN 201420864118U CN 204291154 U CN204291154 U CN 204291154U
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Abstract
The utility model relates to a kind of airborne camera-shooting and recording device video signal processing module, belongs to the module in airborne camera-shooting and recording device system.Video signal input circuit is electrically connected with amplifier follow circuit, differential amplifier circuit, vision signal regulating circuit, signal filter circuit, video signal output circuit order, this vision signal regulating circuit is also connected with failure detector circuit, and this failure detector circuit is also connected with optical alarm circuit, audible alarm circuit respectively.Advantage is novel structure, and vision signal, through the differential amplification of vision signal, adjustment, filtering, makes the vision signal definition of output very high, strong interference immunity, long transmission distance, good stability, solve the problem of video signal detection and warning simultaneously, be applicable to airborne camera-shooting and recording device system.
Description
Technical field
The utility model belongs to the module in airborne camera-shooting and recording device system, refers in particular to video signal processing module.
Background technology
Camera in current airborne camera-shooting and recording device system is distributed in the diverse location of aircraft, the various attitudes be used in Real-Time Monitoring aircraft flight, because camera is distributed in the diverse location of aircraft, vision signal is just connected with camera-shooting and recording device system by the transmission cable of longer distance, long range propagation vision signal will inevitably decay, the brightness of vision signal, colourity, synchronizing signal all can be affected, at present for the video line that the transmission of vision signal all adopts wire diameter thicker, video amplifier enhancing signal strength signal intensity can be increased simultaneously reach long-distance transmissions object in circuit, although the video amplifier can the brightness of augmented video, colourity and synchronizing signal, but interference signal also can be exaggerated in circuit, in addition, the too many video amplifier can not be connected in series in loop, otherwise there will be saturated phenomenon, cause image fault.The quality of video signal quality is vital to airborne camera-shooting and recording device system, because airborne camera-shooting and recording device system applied environment is more special, site environment on aircraft is also very complicated, and transmission range is long, in video signal transmission wire road, increase the video amplifier be easily interfered, directly have influence on the definition of vision signal; And the video amplifier does not have fault detect and warning function, vision signal, once disappear that this is very large to airborne camera-shooting and recording device systematic influence, is directly connected to safety and the personal security of aircraft.
Summary of the invention
The utility model provides a kind of airborne camera-shooting and recording device video signal processing module, is easily disturbed, amplitude fading, vision signal definition are bad, without the problem of video fault detect and warning during to solve the process of vision signal long range propagation.
The technical scheme that the utility model is taked is: video signal input circuit is electrically connected with amplifier follow circuit, differential amplifier circuit, vision signal regulating circuit, signal filter circuit, video signal output circuit order, this vision signal regulating circuit is also connected with failure detector circuit, and this failure detector circuit is also connected with optical alarm circuit, audible alarm circuit respectively.
The utility model has the advantages that novel structure, vision signal is through the differential amplification of vision signal, adjustment, filtering, make the vision signal definition of output very high, strong interference immunity, long transmission distance, good stability, solves the problem of video signal detection and warning simultaneously, is applicable to airborne camera-shooting and recording device system.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Video signal input circuit 1 is electrically connected with amplifier follow circuit 2, differential amplifier circuit 3, vision signal regulating circuit 4, signal filter circuit 5, video signal output circuit 6 order, this vision signal regulating circuit 4 is also connected with failure detector circuit 7, and this failure detector circuit is also connected with optical alarm circuit 8, audible alarm circuit 9 respectively.
Operation principle: adopt two-stage calculation amplifier, the first order is that amplifier follow circuit is for strengthening signal driving force, the second level is differential amplifier circuit, amplification video signal removes the interference in vision signal simultaneously, again through video front regulating circuit, vision signal is regulated, regulating circuit can carry out automatic growth control to vision signal, revise video amplitude error, can filter bag external noise, video signal quality is optimized, to be further processed by signal filter circuit, while vision signal is regulated, fault detect is carried out to vision signal, by sound and optical alarm circuit, operating personnel are reminded when fault being detected, improve the fail safe run.
In Fig. 2, video input signals is inputted by U3 camera, after electric capacity C10 filtering, receive 5 pin of operational amplifier N1B, operational amplifier N1B, filter capacitor C8, C9 forms signal amplifier follow circuit, with the driving force of augmented video signal, vision signal receives by electric capacity C7 coupling the differential amplifier circuit be made up of operational amplifier N2B and peripheral circuit after follower, differential amplification is carried out to video, the effect of differential amplification is the common mode disturbances that amplification video signal removes in vision signal simultaneously, 11 pin of N2B and 4 pin, meet filter capacitor C4 and C5 respectively, 6 pin of N2B are received after resistance R11 and R12 parallel connection, form feedback circuit, C6 electric capacity plays filter action, vision signal after amplification receives 2 pin of adjuster MAX7452 in video circuit by resistance R13 and electric capacity C3, and carry out vision signal impedance matching by resistance R5 ground connection, received 2 pin of video regulator U1 by electric capacity C3 coupling capacitance simultaneously, the noise that 1 pin of U1 and the indirect electric capacity C1 on ground and C2 filter out power bring and High-frequency Interference, the 3 pin ground connection of U1, 3 pin of U1 connect VCC and ground respectively by resistance R9, R10, 5 pin of U1 meet VCC by resistance R8, receive GND by resistance R7, 7 pin of U1 receive VCC and ground respectively by resistance R1 and R2, 8 pin of U1 are video fault detect pin, 1 pin of optocoupler D2A is received by resistance R4, the 2 pin ground of D2A, 8 pin of U1 during fault are not had to be low level, having during fault is high level, the conducting of light lotus root, when namely having a fault, light-emitting diode D1 is luminous, remind operating personnel, in order to better effective prompting, add audible alarm circuit, by resistance R14, R15, R16, triode Q1, loud speaker LS1 forms audible alarm circuit, when there being fault, 8 pin of U1 export high level, triode Q1 conducting, loud speaker is sounded and is reported to the police, operating personnel's vision signal is reminded to there is fault, the 7 pin ground connection of D2A, 8 pin receive the negative pole of D1 by current-limiting resistance R3, the positive pole of D1 receives+12V, vision signal after amplification, filtering, adjustment is input to camera-shooting and recording device system by resistance R6 by 6 pin of U1.
Claims (1)
1. an airborne camera-shooting and recording device video signal processing module, it is characterized in that: video signal input circuit is electrically connected with amplifier follow circuit, differential amplifier circuit, vision signal regulating circuit, signal filter circuit, video signal output circuit order, this vision signal regulating circuit is also connected with failure detector circuit, and this failure detector circuit is also connected with optical alarm circuit, audible alarm circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420864118.4U CN204291154U (en) | 2014-12-31 | 2014-12-31 | Airborne camera-shooting and recording device video signal processing module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420864118.4U CN204291154U (en) | 2014-12-31 | 2014-12-31 | Airborne camera-shooting and recording device video signal processing module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204291154U true CN204291154U (en) | 2015-04-22 |
Family
ID=52874279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420864118.4U Expired - Fee Related CN204291154U (en) | 2014-12-31 | 2014-12-31 | Airborne camera-shooting and recording device video signal processing module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204291154U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107333125A (en) * | 2017-07-10 | 2017-11-07 | 商丘师范学院 | A kind of anti-interference electronic equipment of power application electronic technology |
-
2014
- 2014-12-31 CN CN201420864118.4U patent/CN204291154U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107333125A (en) * | 2017-07-10 | 2017-11-07 | 商丘师范学院 | A kind of anti-interference electronic equipment of power application electronic technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20181231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |