CN102508392A - Method and equipment for synchronizing analog video camera and light-emitting diode (LED) light compensation lamp - Google Patents
Method and equipment for synchronizing analog video camera and light-emitting diode (LED) light compensation lamp Download PDFInfo
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- CN102508392A CN102508392A CN2011103205387A CN201110320538A CN102508392A CN 102508392 A CN102508392 A CN 102508392A CN 2011103205387 A CN2011103205387 A CN 2011103205387A CN 201110320538 A CN201110320538 A CN 201110320538A CN 102508392 A CN102508392 A CN 102508392A
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Abstract
The invention relates to a method and equipment for synchronizing an analog video camera and a light-emitting diode (LED) light compensation lamp. The method comprises the following steps of: 1) separating a field synchronization signal from an analog video signal output by the analog video camera; 2) detecting the exposure moment of a charge coupled device (CCD) of the analog video camera from the field synchronization signal, and sending out a triggering signal according to the exposure moment; and 3) conducting isolating amplification on the triggering signal and then outputting the signal to the LED lamp. The method and the equipment for synchronizing the analog video camera and the LED light compensation lamp have the beneficial effects that since the LED light compensation lamp is synchronously lighted up with analog video, not only can the demand for a light source during image acquisition be met, but also the LED lamp can be turned off when the camera does not work, the electric energy is saved and the goal of environmental protection is achieved.
Description
Technical field
The present invention relates to a kind of analog video camera and the synchronous method and apparatus of LED light filling lamp.
Background technology
Analog video camera refers to does not have input synchronously and the common simulation video camera of exporting synchronously.LED light filling lamp is used with the analog video camera.
Analog video camera, when under the situation of insufficient light, obtaining image, if there is not the light filling facility, that obtains is not fogging clear.The light filling measure of taking has several kinds at present: the shot-light of a kind of Chang Liang of being, and a power all surpasses 100 watts, and a kind of is the LED of Chang Liang, and power is also wanted about 50 watts.The light filling lamp of this Chang Liang had both taken electricity, and the life-span is low again.
Summary of the invention
The present invention solves the problems of the technologies described above a kind of analog video camera and the synchronous method and apparatus of LED light filling lamp are provided.
The technical scheme that the present invention solves the problems of the technologies described above is following: a kind of analog video camera and the synchronous method of LED light filling lamp may further comprise the steps:
Step 1: isolation field synchronizing signal from the analog video signal of analog video camera output;
Step 2: detect time of exposure of analog video camera CCD from field sync signal, and according to sending trigger pip this time of exposure;
Step 3: after isolating amplification, export said trigger pip to the LED lamp.
Further, also comprise the steps: analog video signal is divided into 2 tunnel vision signals before the said step 1, wherein one tunnel vision signal is used for analog video output, and another road signal is used for therefrom isolation field synchronizing signal.
Further, in the said step 2, the time shutter of analog video camera is the bright lamp duration of LED light filling lamp.
Further, in the said step 2, the zero hour of said trigger pip be field sync signal width forward one-period push away a schedule time value; Said trigger pip length is the aperture time of analog video camera.
Further, said schedule time value is 3.5MS.
A kind of equipment of realizing the method that a kind of analog video camera as claimed in claim 1 and LED light filling lamp are synchronous comprises the isolated drive circuit module of the field sync signal separation module, field sync signal processing module and the LED lamp trigger pip that connect successively,
Said field sync signal separation module is used for the analog video signal of analog video camera is isolated field sync signal, and sends it to said field sync signal processing module;
Said field sync signal processing module detects time of exposure of analog video camera CCD according to the field sync signal that receives, and according to sending trigger pip this time of exposure;
The isolated drive circuit module of said LED lamp trigger pip is used for exporting the LED lamp to after the said trigger pip isolation amplification.
Further; Also comprise the video signal distribution circuit module; Said video signal distribution circuit module one end is connected with said analog video camera, and the other end is connected with said field sync signal separation module, is used for the analog video signal of analog video camera is divided into 2 tunnel vision signals; Wherein one tunnel vision signal is used for analog video output, and another road signal is used for therefrom isolation field synchronizing signal.
The invention has the beneficial effects as follows: LED light filling lamp of the present invention, adopt the method for lighting synchronously with analog video, the demand of light source in the time of can satisfying IMAQ can be turned off the LED lamp again when video camera is not worked, save electric energy, reaches the purpose of environmental protection.
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Description of drawings
Fig. 1 is the structured flowchart of the equipment of the synchronous method of a kind of analog video camera of the present invention and LED light filling lamp;
Fig. 2 is the circuit theory diagrams of the equipment of the synchronous method of a kind of analog video camera of the present invention and LED light filling lamp;
Fig. 3 is the process flow diagram of the synchronous method of a kind of analog video camera of the present invention and LED light filling lamp.
Embodiment
Below in conjunction with accompanying drawing principle of the present invention and characteristic are described, institute gives an actual example and only is used to explain the present invention, is not to be used to limit scope of the present invention.
As shown in Figure 3, a kind of analog video camera and the synchronous method of LED light filling lamp may further comprise the steps:
Step 1: isolation field synchronizing signal from the analog video signal of analog video camera output;
Step 2: detect time of exposure of analog video camera CCD from field sync signal, and according to sending trigger pip this time of exposure;
Step 3: after isolating amplification, export said trigger pip to the LED lamp.
Also comprise the steps: analog video signal is divided into 2 tunnel vision signals before the said step 1, wherein one tunnel vision signal is used for analog video output, and another road signal is used for therefrom isolation field synchronizing signal.
In the said step 2, the time shutter that the bright lamp duration of LED light filling lamp is an analog video camera; The zero hour of the trigger pip of said LED lamp be field sync signal width forward one-period push away a schedule time value; The trigger pip length of said LED lamp is the aperture time of analog video camera.
As depicted in figs. 1 and 2; A kind of equipment of realizing the method that a kind of analog video camera as claimed in claim 1 and LED light filling lamp are synchronous; The isolated drive circuit module that comprises the field sync signal separation module, field sync signal processing module and the LED lamp trigger pip that connect successively
Said field sync signal separation module is used for the analog video signal of analog video camera is isolated field sync signal, and sends it to said field sync signal processing module;
Said field sync signal processing module detects time of exposure of analog video camera CCD according to the field sync signal that receives, and according to sending trigger pip this time of exposure;
The isolated drive circuit module of said LED lamp trigger pip is used for exporting the LED lamp to after the said trigger pip isolation amplification.
Also comprise the video signal distribution circuit module; Said video signal distribution circuit module one end is connected with said analog video camera; The other end is connected with said field sync signal separation module; Be used for the analog video signal of analog video camera is divided into 2 tunnel vision signals, wherein one tunnel vision signal is used for analog video output, and another road signal is used for therefrom isolation field synchronizing signal.
During concrete the use, after analog video signal inputs to the video signal distribution circuit module, be assigned to 2 road videos.Wherein one tunnel vision signal outputs to video capture device, is used for the output of analog video.Another road vision signal outputs in the field sync signal separation module, and output triggers the field sync signal that LED uses.(present embodiment we with under the pal mode, the camera shutter time is set to 1/250 second, the explanation synchronizing signal production process.) under the pal mode, the analog video signal frequency is 50HZ, one-period is 20ms, the synchronous triggering signal production process of its LED lamp is: the isolated field sync signal width of field sync signal separation module is 192 μ S, and frequency is 50HZ.The field sync signal processing module is after receiving field sync signal; One-period pushes away a schedule time value forward; (video camera adopts different shutters to schedule time value for 3.5MS in the present embodiment; It seeks the video camera exposure schedule time value difference of the zero hour according to field sync signal, and the width of consequent trigger pip is also different.), this makes public the zero hour (being the shutter zero hour) for video camera constantly, and with the zero hour of this moment as the trigger pip of LED lamp, this trigger pip length is the aperture time of video camera, i.e. 4ms.As output, process is isolated rear drive LED stroboscopic light filling lamp to the field sync signal processing module this trigger pip.
With this kind mode driving LED lamp, signal frequency is 50HZ, and dutycycle is 1:5, and so, it is bright that the LED lamp has only time of 1/5.Can satisfy the needs of light filling, can save electric energy again, and can increase the service life.And in practical application, the width of trigger pip has 2MS just much of that, means that the dutycycle of LED lamp has only 1/10, can save electric energy greatly; And like this low dutycycle can improve the drive current of LED, to obtain higher brightness, does not damage LED again.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. analog video camera and the synchronous method of LED light filling lamp is characterized in that: may further comprise the steps:
Step 1: isolation field synchronizing signal from the analog video signal of analog video camera output;
Step 2: detect time of exposure of analog video camera CCD from field sync signal, and according to sending trigger pip this time of exposure;
Step 3: after isolating amplification, export said trigger pip to the LED lamp.
2. a kind of analog video camera according to claim 1 and the synchronous method of LED light filling lamp; It is characterized in that: also comprise the steps: analog video signal is divided into 2 tunnel vision signals before the said step 1; Wherein one tunnel vision signal is used for analog video output, and another road signal is used for therefrom isolation field synchronizing signal.
3. a kind of analog video camera according to claim 1 and the synchronous method of LED light filling lamp is characterized in that: in the said step 2, the time shutter of analog video camera is the bright lamp duration of LED light filling lamp.
4. a kind of analog video camera according to claim 1 and the synchronous method of LED light filling lamp is characterized in that: in the said step 2, the zero hour of said trigger pip be field sync signal width forward one-period push away a schedule time value; Said trigger pip length is the aperture time of analog video camera.
5. a kind of analog video camera according to claim 4 and the synchronous method of LED light filling lamp is characterized in that: said schedule time value is 3.5MS.
6. equipment of realizing the method that a kind of analog video camera as claimed in claim 1 and LED light filling lamp are synchronous; It is characterized in that: the isolated drive circuit module that comprises the field sync signal separation module, field sync signal processing module and the LED lamp trigger pip that connect successively
Said field sync signal separation module is used for the analog video signal of analog video camera is isolated field sync signal, and sends it to said field sync signal processing module;
Said field sync signal processing module detects time of exposure of analog video camera CCD according to the field sync signal that receives, and according to sending trigger pip this time of exposure;
The isolated drive circuit module of said LED lamp trigger pip is used for exporting the LED lamp to after the said trigger pip isolation amplification.
7. the equipment of the method that a kind of analog video camera according to claim 6 and LED light filling lamp are synchronous; It is characterized in that: also comprise the video signal distribution circuit module; Said video signal distribution circuit module one end is connected with said analog video camera; The other end is connected with said field sync signal separation module; Be used for the analog video signal of analog video camera is divided into 2 tunnel vision signals, wherein one tunnel vision signal is used for analog video output, and another road signal is used for therefrom isolation field synchronizing signal.
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| CN2011103205387A CN102508392A (en) | 2011-10-20 | 2011-10-20 | Method and equipment for synchronizing analog video camera and light-emitting diode (LED) light compensation lamp |
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| CN2011103205387A CN102508392A (en) | 2011-10-20 | 2011-10-20 | Method and equipment for synchronizing analog video camera and light-emitting diode (LED) light compensation lamp |
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| CN102932603A (en) * | 2012-08-16 | 2013-02-13 | 浙江宇视科技有限公司 | Light supplementation control method and camera |
| CN106412454A (en) * | 2016-10-18 | 2017-02-15 | 南京大学 | Device and method for obtaining clear image in real time based on CCD sensor in dark scene |
| WO2019206225A1 (en) * | 2018-04-28 | 2019-10-31 | 维沃移动通信有限公司 | Light supplement method and mobile terminal |
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| CN2636582Y (en) * | 2003-08-27 | 2004-08-25 | 重庆优讯科技有限责任公司 | Digital camera intelligent radio synchronous flashing lamp device |
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| WO2019206225A1 (en) * | 2018-04-28 | 2019-10-31 | 维沃移动通信有限公司 | Light supplement method and mobile terminal |
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Application publication date: 20120620 |