CN102938847B - Video signal failure warning control method - Google Patents
Video signal failure warning control method Download PDFInfo
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- CN102938847B CN102938847B CN201210495011.2A CN201210495011A CN102938847B CN 102938847 B CN102938847 B CN 102938847B CN 201210495011 A CN201210495011 A CN 201210495011A CN 102938847 B CN102938847 B CN 102938847B
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Abstract
The invention discloses a video signal failure warning control method, and relates to the technical field of video signal failure warning. A video signal conversion device, a filter device, a voltage comparison device, a rapid-charging and slow-discharging device and a warning device, which are orderly connected, are used in the method. In the voltage comparison device, the voltage input by a comparison voltage input end of a voltage comparator is less than 2.5V, and the voltage output by an output end of the voltage comparator is 0V, conversely, the voltage output by the output end of the voltage comparator is the voltage input by the comparison voltage input end of the voltage comparator. When a camera cannot work normally, the warning device can give an alarm in time, when a manager hears or sees the alarm, the manager can repair the failed camera in time; and the warning device of the video signals can be displayed on a displayer, so that workers can know the failed camera just by observing the displayer.
Description
Technical field
The present invention relates to vision signal fault alarm technical field, specifically a kind of vision signal fault alarm control method.
Background technology
Video monitoring is the important component part of safety and protection system, and it is the integrated system that a kind of prevention ability is stronger.Video monitoring is directly perceived with it, accurately, timely and the information content is abundant and be widely used in many occasions.In recent years, along with the develop rapidly of computer, network and image procossing, transmission technology, Video Supervision Technique there has also been significant progress.
Along with the development of Video Supervision Technique is popularized, be seen everywhere in life.The Real-time Monitor Technique of video, from application scenarios, real-time video can be used for multiple outdoor occasion, as traffic accident easy happen zone end, the highway bayonet socket position of highway; The auxiliary driving facility guarded region of bus; Each emphasis place that public security organ pays close attention to and region; The key monitoring region of power plant and power transmitting device; School, city commercial center and city square etc.
Along with popularizing of real-time video monitoring, display for video monitoring also changes thereupon, a camera will corresponding to a display window, if camera quantity is little, so just control each camera very well, when monitoring camera arrives hundreds of, just likely in display, just there is certain difficulty, so just have video wall to complete the task of real-time video monitoring display, but when monitoring camera reaches thousands of, if want to show in real time each camera transmit the real-time scene come, such video wall also can not meet such demand.Like this certainly will the video information of camera of a display section, then the video information of each camera is shown in turn, so part camera will be had all the time to be in consistency operation, the information of these cameras is can not see in the display frame on foreground at all, if do not have vision signal at the camera of background work like this, staff can not find.Camera does not have signal if the very of short duration time belongs to normal phenomenon, if there is no signal for a long time, illustrate that this road camera there occurs fault, if this information can not be informed keeper timely, so likely can miss very useful video information.In view of the above-mentioned vision signal fault occurring consistency operation, or appear at these technical problems of vision signal fault of foreground, the present invention will solve the technical problem of these existence.
Summary of the invention
For the vision signal fault of the vision signal fault and foreground that overcome consistency operation of the prior art, a kind of vision signal failure alarm circuit and control method are provided, when camera cisco unity malfunction, can report to the police timely, when administrative staff hear or see warning, can the camera broken down be keeped in repair timely.
The present invention realizes with following technical scheme: a kind of vision signal fault alarm control method, adopt connect successively video-signal converting apparatus, filter, voltage comparator device, fill and put device and warning device slowly soon;
Described video-signal converting apparatus comprises BNC plug-in unit, the first resistance, the first electric capacity and connects vision signal Sync Separator Chip, BNC plug-in unit inner core connects one end of the first resistance and the first electric capacity, the earthing of casing of BNC plug-in unit, the other end ground connection of the first resistance, the first electric capacity other end connects vision signal Sync Separator Chip video input pin, vision signal Sync Separator Chip has traditional reset circuit, and vision signal Sync Separator Chip is from output pin output voltage values;
Described filter comprises the first diode, the second resistance and the second electric capacity, the second resistor coupled in parallel at the two ends of the first diode, the output of termination first diode of the second electric capacity, other end ground connection;
Described voltage comparator device comprises voltage comparator, the 3rd resistance and the 4th resistance, voltage comparator driving voltage input inputs a rated voltage, voltage comparator reference voltage input is connected with the 3rd resistance, the 4th resistance, another termination voltage input end of 3rd resistance, 4th resistance other end ground connection, voltage comparator ground pin ground connection;
Described filling soon is put device slowly and is comprised the second diode, the 3rd diode, the 5th resistance, the 6th resistance, the 3rd electric capacity and the 4th electric capacity; The negative pole of the second diode connects the output of the 3rd diode, the input of the 3rd diode connects the 6th resistance and the 3rd electric capacity, the 3rd electric capacity other end ground connection, and the 6th resistance other end connects the 4th electric capacity, 4th electric capacity other end ground connection, the 5th resistance and the 3rd diodes in parallel;
Described warning device comprises Darlington transistor, relay and the 4th diode; The grounded emitter of a triode after Darlington transistor, Darlington output connects relay input, relay driving voltage input input rated voltage, the 3rd diode and relay are relative to driving voltage reverse parallel connection, and control signal is exported by relay output end;
In video-signal converting apparatus, the signal output pin of vision signal Sync Separator Chip connects the input of the first diode in filter, the output of the first diode connects the comparative voltage input of voltage comparator in voltage comparator device, the input putting the second diode in device is slowly filled in the connection of voltage comparator output soon, and the 6th resistance connects the input of Darlington transistor in warning device; Concrete steps are:
, vision signal incoming video signal conversion equipment, vision signal is changed into the voltage signal corresponded;
, step
the voltage signal obtained, by filter, makes it output galvanic current pressure;
, step
middle obtained stable DC voltage is input to the comparative voltage input of voltage comparator, make it compared with reference voltage 2.5V voltage, when stable DC voltage is more than or equal to 2.5V, the output of voltage comparator exports this voltage, otherwise the output of voltage comparator exports 0V;
, step
in output voltage values put device slowly, in the warning device described in input, if step by fill soon
described in voltage when being more than or equal to 2.5V, vision signal is now normal, if step
described in voltage when being less than 2.5V, now voltage comparator exports is 0, and vision signal is unstable, and warning device is reported to the police.
The beneficial effect that the present invention has is:
(1) when camera cisco unity malfunction, warning device can be reported to the police timely, when administrative staff hear or see warning, can keep in repair timely the camera broken down;
(2) warning device of vision signal can show over the display, and staff only needs observation display, just can know which camera breaks down.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is the utility model theory diagram;
Fig. 2 is the utility model circuit diagram.
Embodiment
As shown in Figure 1, a kind of vision signal failure warning system, comprise video-signal converting apparatus, filter, voltage comparator device, fill and put device and warning device slowly soon, five devices connect successively.
As shown in Figure 2, circuit in four devices specifically connects as follows: be first that video heads BNC plug-in unit 11 inner core connects the first resistance 12 and electric capacity 13, the earthing of casing of BNC plug-in unit 11, the other end ground connection of the first resistance 12, first electric capacity 13 other end connects the video input pin two of vision signal Sync Separator Chip 14, the pin 8 of vision signal Sync Separator Chip 14 accesses 5V voltage, vision signal Sync Separator Chip 14 adopts LM1881 chip, vision signal Sync Separator Chip 14 has traditional reset circuit, vision signal Sync Separator Chip 14 is from output pin 1, output voltage values, output pin 1 is connected with the first diode 21 output, first diode 21 input is connected with the second electric capacity 22, second resistance 23 is in parallel with the first diode 21, the other end ground connection of the second electric capacity 22, second electric capacity 22 is connected with the comparative voltage input of voltage comparator 31, voltage comparator 31 driving voltage input input 5V rated voltage, voltage comparator 31 reference voltage input and resistance are the 3rd resistance 32 of 2K Ω, 4th resistance 33 connects, another termination voltage input end of 3rd resistance 32, 4th resistance 33 other end ground connection, voltage comparator 31 pin 5 ground connection, voltage comparator 31 output output voltage values, voltage comparator 31 output is connected with the second diode 41 input, the output of the second diode 41 connects the output of the 3rd diode 42, the input of the 3rd diode 42 connects the 6th resistance 44 and the 3rd electric capacity 45, 3rd electric capacity 45 other end ground connection, 6th resistance 44 other end connects the 4th electric capacity 46, 4th electric capacity 46 other end ground connection, 5th resistance 43 is in parallel with the 3rd diode 42, the input of Darlington transistor 51 connects the 6th resistance 44, the grounded emitter of the rear triode of Darlington transistor 51, Darlington 51 output connects relay 52 input pin one, relay 52 driving voltage input pin two input 12V rated voltage, diode 53 and relay 52 are relative to driving voltage reverse parallel connection, control signal is exported by relay 52 output, relay 52 pin 4 inputs a high level, when relay 52 pin one input high level, relay 52 pin 4 and pin 8 conducting, pin 8 output low level, otherwise when relay 52 pin one inputs 0, relay 52 pin 4 and pin 6 conducting, pin 6 exports high level.
Wherein, in voltage comparator circuit, the 3rd resistance 32 and the 4th resistance 33 resistance are respectively 2 kilohms, and the driving voltage of voltage comparator 31 is 5V, and the input voltage of voltage comparator 31 reference voltage input is 2.5V;
The voltage of described voltage comparator 31 comparative voltage input input is less than 2.5V, the output output voltage values of voltage comparator 31 is 0V, otherwise the output output voltage of voltage comparator 31 is the magnitude of voltage of voltage comparator 31 comparative voltage input input.
The course of work:
, vision signal incoming video signal conversion equipment, by LM1881 chip, vision signal is changed into the voltage signal corresponded;
, step
the voltage signal obtained, by filter, makes it output galvanic current pressure;
, step
middle obtained stable DC voltage is input to the comparative voltage input of voltage comparator, make it compared with reference voltage 2.5V voltage, when stable DC voltage is more than or equal to 2.5V, the output of voltage comparator exports this voltage, otherwise the output of voltage comparator exports 0V;
, step
in output voltage values by filling slow circuit soon, the input of the Darlington transistor 51 in the alarm control circuit described in input, amplifies its voltage through Darlington transistor 51, is input to the input of relay, step
described in voltage when being more than or equal to 2.5V, voltage is now through the amplification of Darlington transistor 51, and be enough under armature inhales by control relay 52, it is 0 that vision signal normal relay now exports; Otherwise step
described in voltage when being less than 2.5V, now voltage comparator exports is 0, and vision signal is unstable, and relay exports high level, and warning device is reported to the police.
When camera cisco unity malfunction, can report to the police timely, when administrative staff hear or see warning, can the camera broken down be keeped in repair timely.The warning device of warning device vision signal can show over the display in addition, and staff only needs observation display, just can know which camera breaks down.
Those skilled in the art should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.
Claims (1)
1. a vision signal fault alarm control method, adopt connect successively video-signal converting apparatus, filter, voltage comparator device, fill and put device and warning device slowly soon; It is characterized in that:
Described video-signal converting apparatus comprises BNC plug-in unit (11), first resistance (12), first electric capacity (13) and connect vision signal Sync Separator Chip (14), BNC plug-in unit (11) inner core connects one end of the first resistance (12) and the first electric capacity (13), the earthing of casing of BNC plug-in unit (11), the other end ground connection of the first resistance (12), first electric capacity (13) other end connects vision signal Sync Separator Chip (14) video input pin, vision signal Sync Separator Chip (14) has traditional reset circuit, vision signal Sync Separator Chip (14) is from output pin output voltage values,
Described filter comprises the first diode (21), the second resistance (23) and the second electric capacity (22), second resistance (23) is connected in parallel on the two ends of the first diode (21), the output of one termination first diode (21) of the second electric capacity (22), other end ground connection;
Described voltage comparator device comprises voltage comparator (31), the 3rd resistance (32) and the 4th resistance (33), voltage comparator (31) driving voltage input inputs a rated voltage, voltage comparator (31) reference voltage input is connected with the 3rd resistance (32), the 4th resistance (33), another termination voltage input end of 3rd resistance (32), 4th resistance (33) other end ground connection, voltage comparator (31) ground pin ground connection;
Described filling soon is put device slowly and is comprised the second diode (41), the 3rd diode (42), the 5th resistance (43), the 6th resistance (44), the 3rd electric capacity (45) and the 4th electric capacity (46); The negative pole of the second diode (41) connects the output of the 3rd diode (42), the input of the 3rd diode (42) connects the 6th resistance (44) and the 3rd electric capacity (45), 3rd electric capacity (45) other end ground connection, 6th resistance (44) other end connects the 4th electric capacity (46), 4th electric capacity (46) other end ground connection, the 5th resistance (43) is in parallel with the 3rd diode (42);
Described warning device comprises Darlington transistor (51), relay (52) and the 4th diode (53); The grounded emitter of the rear triode of Darlington transistor (51), Darlington (51) output connects relay (52) input, relay (52) driving voltage input input rated voltage, 3rd diode (53) and relay (52) are relative to driving voltage reverse parallel connection, and control signal is exported by relay (52) output;
In video-signal converting apparatus, the signal output pin of vision signal Sync Separator Chip (14) connects the input of the first diode (21) in filter, the comparative voltage input of voltage comparator (31) in the output link voltage comparison means of the first diode (21), the input putting the second diode (41) in device is slowly filled in the connection of voltage comparator (31) output soon, and the 6th resistance (44) connects the input of Darlington transistor (51) in warning device; Concrete steps are:
, vision signal incoming video signal conversion equipment, vision signal is changed into the voltage signal corresponded;
, step
the voltage signal obtained, by filter, makes it output galvanic current pressure;
, step
middle obtained stable DC voltage is input to the comparative voltage input of voltage comparator, make it compared with reference voltage 2.5V voltage, when stable DC voltage is more than or equal to 2.5V, the output of voltage comparator exports this voltage, otherwise the output of voltage comparator exports 0V;
, step
in output voltage values put device slowly, in the warning device described in input, if step by fill soon
described in voltage when being more than or equal to 2.5V, vision signal is now normal, if step
described in voltage when being less than 2.5V, now voltage comparator exports is 0, and vision signal is unstable, and warning device is reported to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210495011.2A CN102938847B (en) | 2012-11-28 | 2012-11-28 | Video signal failure warning control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210495011.2A CN102938847B (en) | 2012-11-28 | 2012-11-28 | Video signal failure warning control method |
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| Publication Number | Publication Date |
|---|---|
| CN102938847A CN102938847A (en) | 2013-02-20 |
| CN102938847B true CN102938847B (en) | 2014-12-17 |
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| CN201210495011.2A Expired - Fee Related CN102938847B (en) | 2012-11-28 | 2012-11-28 | Video signal failure warning control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105072384A (en) * | 2015-07-23 | 2015-11-18 | 柳州正高科技有限公司 | Method for obtaining football moving images |
| CN107910913A (en) * | 2017-11-24 | 2018-04-13 | 卫星电子（中山）有限公司 | A kind of slow discharge circuit of DC power supply output |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63278197A (en) * | 1987-05-11 | 1988-11-15 | Shigumatsukusu Kk | Monitoring device |
| JPH11126248A (en) * | 1997-10-22 | 1999-05-11 | Fuji Heavy Ind Ltd | Image processing system |
| CN101006734A (en) * | 2005-05-19 | 2007-07-25 | 松下电器产业株式会社 | Abnormality detecting apparatus |
| CN101093602A (en) * | 2007-06-21 | 2007-12-26 | 谢国雄 | Alarm system for monitoring video state |
| CN102364532A (en) * | 2011-09-23 | 2012-02-29 | 无锡艾德里安科技有限公司 | Static video surveillance alarm system |
-
2012
- 2012-11-28 CN CN201210495011.2A patent/CN102938847B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63278197A (en) * | 1987-05-11 | 1988-11-15 | Shigumatsukusu Kk | Monitoring device |
| JPH11126248A (en) * | 1997-10-22 | 1999-05-11 | Fuji Heavy Ind Ltd | Image processing system |
| CN101006734A (en) * | 2005-05-19 | 2007-07-25 | 松下电器产业株式会社 | Abnormality detecting apparatus |
| CN101093602A (en) * | 2007-06-21 | 2007-12-26 | 谢国雄 | Alarm system for monitoring video state |
| CN102364532A (en) * | 2011-09-23 | 2012-02-29 | 无锡艾德里安科技有限公司 | Static video surveillance alarm system |
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